Dr. Riccardo Bertacco (Full Professor)

Profile

Riccardo Bertacco
Department of Physics – Polifab
Politecnico di Milano
via G. Colombo 81, 20133 Milano
Phone: +39 02 2399 9663
E-mail: riccardo.bertacco@polimi.it
Skype: riccardo.bertacco

Riccardo Bertacco was born in 1968 in Varese, Italy. He graduated in Electronic Engineering at Politecnico di Milano in 1994 and initially worked in the R&D of BTicinico as circuit designer. From fall 1994 to 1996 we worked as volunteer in Cameroun, within a program granted by the Ministero Affari Esteri. He got his PhD in Physics in 2000 at Politecnico di Milano. In 2001 he worked in the group of J. P. Contour and A. Fert (Nobel Laureate for Physics 2007) as visiting researcher. Since 2005, he was associate professor at the Physics Department of Politecnico di Milano, where he leads the Nanomagnetim for Biology and Spintronics group (NaBiS). Since 2018, he is Full Professor. He is the deputy director of the novel clean-room (PoliFab) for micro and nanofabrication of POLIMI. He is currently coordinating 3 granted projects. He is author of 115 papers in international journals, two chapters of books and 7 patent applications. Current H index: 21 (Scopus). He gives annual courses of classical physics, an advanced course on “Nanomagnetism and spintronics” and lectures in PhD schools.

Publications

2015

  • M. Monticelli, E. Albisetti, D. Petti, D. V. Conca, M. Falcone, P. P. Sharma, and R. Bertacco, “Towards an on-chip platform for the controlled application of forces via magnetic particles: A novel device for mechanobiology,” , vol. 117, iss. 17, p. –, 2015.
    [Bibtex]
    @Article{Monticelli2015,
    Title = {Towards an on-chip platform for the controlled application of forces via magnetic particles: A novel device for mechanobiology},
    Author = {Monticelli, M. and Albisetti, E. and Petti, D. and Conca, D.V. and Falcone, M. and Sharma, P.P. and Bertacco, R.},
    Year = {2015},
    Number = {17},
    Pages = {--},
    Volume = {117},
    __markedentry = {[User:6]},
    Abstract = {In-vitro tests and analyses are of fundamental importance for investigating biological mechanisms in cells and bio-molecules. The controlled application of forces to activate specific bio-pathways and investigate their effects, mimicking the role of the cellular environment, is becoming a prominent approach in this field. In this work, we present a non-invasive magnetic on-chip platform which allows for the manipulation of magnetic particles, through micrometric magnetic conduits of Permalloy patterned on-chip. We show, from simulations and experiments, that this technology permits to exert a finely controlled force on magnetic beads along the chip surface. This force can be tuned from few to hundreds pN by applying a variable external magnetic field. © 2015 AIP Publishing LLC.},
    Address = {LNESS, Dipartimento di Fisica, Politecnico di Milano, Via Anzani 42, Como, Italy},
    Booktitle = {Journal of Applied Physics},
    Comment = {Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84927766900&partnerID=40&md5=7582699b933c77b565b03531af9b8380}
    }
  • G. Radaelli, D. Gutiérrez, F. Sánchez, R. Bertacco, M. Stengel, and J. Fontcuberta, “Large room-temperature electroresistance in dual-modulated ferroelectric tunnel barriers,” , vol. 27, iss. 16, p. 2602–2607, 2015.
    [Bibtex]
    @Article{Radaelli2015,
    Title = {Large room-temperature electroresistance in dual-modulated ferroelectric tunnel barriers},
    Author = {Radaelli, G. and Gutiérrez, D. and Sánchez, F. and Bertacco, R. and Stengel, M. and Fontcuberta, J.},
    Year = {2015},
    Number = {16},
    Pages = {2602--2607},
    Volume = {27},
    __markedentry = {[User:6]},
    Abstract = {Pt/BaTiO3/La0.7Sr0.3MnO3 tunnel junctions, at negative voltage bias, for two polarization directions are represented. It is demonstrated that reversing the polarization direction of a ferroelectric barrier in a tunnel junction leads to a change of junction conductance and capacitance, with concomitant variations on the barrier height and effective thickness, both contributing to produce larger electroresistance. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.},
    Address = {Instituto Italiano di Tecnologia, Smart Materials-Nanophysics Department, Via Morego 30, Genoa, Italy},
    Booktitle = {Advanced Materials},
    Comment = {Export Date: 26 June 2015},
    Keywords = {depletion width, electroresistance, ferroelectric tunnel junction, Schottky barrier},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84928012913&partnerID=40&md5=6bafc7d539beb474e161656964c1c836}
    }

2014

  • E. Albisetti, D. Petti, F. Damin, M. Cretich, A. Torti, M. Chiari, and R. Bertacco, “Photolithographic bio-patterning of magnetic sensors for biomolecular recognition,” , vol. 200, p. 39–46, 2014.
    [Bibtex]
    @Article{Albisetti2014,
    Title = {Photolithographic bio-patterning of magnetic sensors for biomolecular recognition},
    Author = {Albisetti, E. and Petti, D. and Damin, F. and Cretich, M. and Torti, A. and Chiari, M. and Bertacco, R.},
    Year = {2014},
    Pages = {39--46},
    Volume = {200},
    __markedentry = {[User:6]},
    Abstract = {In the last years, magnetoresistive biosensors arrays have drawn a great interest due to their high sensitivity and integrability in lab-on-chip platforms. In such devices, the selective functionalization of the sensor active area is a major issue, in order to achieve high sensitivity and quantification capability. Here, we present a straightforward photolithographic procedure to create patterns of bio-reactive polymer regions on the sensor's surface, with micrometric resolution. The effectiveness of the procedure in providing high specificity and improved sensor performance is demonstrated in the case of magnetoresistive biosensors based on magnetic tunneling junctions (MTJs). On-chip biomolecular recognition assays demonstrate an enhanced sensitivity in selectively functionalized sensors with respect to non-patterned sensors, eventually leading to a limit of detection below the pM range, without target pre-concentration or chemical amplification. © 2014 Elsevier B.V.},
    Address = {Istituto di Chimica Del Riconoscimento Molecolare, CNR, Via Mario Bianco 9, 20131 Milan, Italy},
    Booktitle = {Sensors and Actuators, B: Chemical},
    Comment = {Cited By :1
    Export Date: 26 June 2015},
    Keywords = {Bio-patterning, DNA hybridization, Magnetic bead, Magnetic biosensor, Magnetic tunneling junction, Selective functionalization},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84899799345&partnerID=40&md5=9dfc192abf3384c733666b0672962ea8}
    }
  • M. Cantoni, S. Boseggia, D. Petti, A. Cattoni, and R. Bertacco, “Structural comparison between MgO/Fe(0 0 1) and MgO/Fe(0 0 1)-p(1×1)O interfaces for magnetic tunneling junctions: An Auger electron diffraction study,” , vol. 305, p. 167–172, 2014.
    [Bibtex]
    @Article{Cantoni2014,
    Title = {Structural comparison between MgO/Fe(0 0 1) and MgO/Fe(0 0 1)-p(1x1)O interfaces for magnetic tunneling junctions: An Auger electron diffraction study},
    Author = {Cantoni, M. and Boseggia, S. and Petti, D. and Cattoni, A. and Bertacco, R.},
    Year = {2014},
    Pages = {167--172},
    Volume = {305},
    __markedentry = {[User:6]},
    Abstract = {Magnetic tunnel junctions based on MgO(0 0 1) barriers and ferromagnetic electrodes, such as Fe/MgO/Fe, represent a very popular and widely investigated subject in the field of spin-electronics because of the large values of magnetoresistance shown by these systems. In this paper, the structural properties of MgO thin films grown onto Fe(0 0 1) and MgO/Fe(0 0 1)-p(1 -- 1)O surfaces, with MgO thickness ranging from 2 to 14 equivalent monolayers, have been investigated by means of Auger electron diffraction. The structural order and the crystal quality of the MgO films result practically independent from the template, the latter being either the clean Fe(0 0 1) surface or the oxidized Fe(0 0 1)-p(1 -- 1)O one. This is confirmed by numerical simulations, showing that, apart from the first two MgO layers close to the interface, the structure is unaffected by the choice of the starting surface. By a structural point of view, we can conclude that Fe(0 0 1)-p(1 -- 1)O is a good candidate for the role of bottom electrode for the realization of MgO-based magnetic tunnelling junctions, also considering its higher chemical stability and reproducibility if compared to the clean Fe(0 0 1) surface. © 2014 Elsevier B.V.},
    Address = {Laboratoire de Photonique et de Nanostructures, Route deNozay, 91460 Marcoussis, France},
    Booktitle = {Applied Surface Science},
    Comment = {Export Date: 26 June 2015},
    Keywords = {Auger electron diffraction, Background subtraction, Fe(0 0 1)-p(1 -- 1), Iron, Magnesium oxide, Magnetic tunneling junction},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84899914112&partnerID=40&md5=67d5b87ce2431aeb6c2b528112468708}
    }
  • M. Carminati, G. Ferrari, S. U. Kwon, M. Sampietro, M. Monticelli, A. Torti, D. Petti, E. Albisetti, M. Cantoni, and R. Bertacco, “Towards the impedimetric tracking of single magnetically trailed microparticles,” in 2014 IEEE 11th International Multi-Conference on Systems, Signals and Devices, SSD 2014, LNESS – Dipartimento di Fisica, Politecnico di Milano, Como, Italy, 2014, p. –.
    [Bibtex]
    @InProceedings{Carminati2014,
    Title = {Towards the impedimetric tracking of single magnetically trailed microparticles},
    Author = {Carminati, M. and Ferrari, G. and Kwon, S.U. and Sampietro, M. and Monticelli, M. and Torti, A. and Petti, D. and Albisetti, E. and Cantoni, M. and Bertacco, R.},
    Booktitle = {2014 IEEE 11th International Multi-Conference on Systems, Signals and Devices, SSD 2014},
    Year = {2014},
    Address = {LNESS - Dipartimento di Fisica, Politecnico di Milano, Como, Italy},
    Pages = {--},
    __markedentry = {[User:6]},
    Abstract = {We present the design and the preliminary experimental characterization of a novel lab-on-a-chip platform for high-sensitivity impedimetric detection of single magnetic beads employed as magnetic cargos with molecular payload for accurate drug delivery. The real-time impedimetric detection of these superparamagnetic microbeads in saline solution is here experimentally demonstrated (20 nS conductance variation for a single 1μm bead), validating the insulating-sphere model and the finite-element simulations employed for optimal electrode design. A custom electronic front-end for impedance tracking in the 1-10 MHz range, required to compensate the impact of the large parasitic impedance due to the silicon substrate, is also presented. Thanks to introduction of an ad-hoc noise cancelling network based on a dummy circuit and a phase shifter for low-frequency phase noise counteraction by active subtraction, slow fluctuations are significantly reduced (by a factor 10), allowing a SNR > 10. © 2014 IEEE.},
    Comment = {Export Date: 26 June 2015},
    Keywords = {drug delivery, impedance detection, Magnetic beads, microelectrodes},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84901329343&partnerID=40&md5=405fc1b60b2d1ae138f663b2a3cdebf9}
    }
  • S. Dal Conte, M. Conforti, D. Petti, E. Albisetti, S. Longhi, R. Bertacco, C. De Angelis, G. Cerullo, and G. Della Valle, “Disentangling electrons and lattice nonlinear optical response in metal-dielectric Bragg filters,” , vol. 89, iss. 12, p. –, 2014.
    [Bibtex]
    @Article{DalConte2014,
    Title = {Disentangling electrons and lattice nonlinear optical response in metal-dielectric Bragg filters},
    Author = {Dal Conte, S. and Conforti, M. and Petti, D. and Albisetti, E. and Longhi, S. and Bertacco, R. and De Angelis, C. and Cerullo, G. and Della Valle, G.},
    Year = {2014},
    Number = {12},
    Pages = {--},
    Volume = {89},
    __markedentry = {[User:6]},
    Abstract = {We investigate by broadband femtosecond pump-probe spectroscopy the transient optical response of a metal-dielectric Bragg filter (MDBF) made of thin layers of gold and fused silica. A quantitative comparison of the experimental results with a semiclassical model with no fitting parameters allows us to disentangle all the different contributions to the transient optical response of the MDBF, which include the ultrafast dynamics of thermalized and nonthermalized electrons as well as of lattice phonons excited in the metal layers. Furthermore, we provide a quantitative comparison of the optical response of the MDBF with that of a single gold layer under comparable excitation conditions. The results clearly show the advantages and disadvantages of the multilayer configuration in terms of all-optical-modulation capability. © 2014 American Physical Society.},
    Address = {L-NESS, Dipartimento di Fisica, Politecnico di Milano-Polo di Como, Via Anzani 42, I-22100 Como, Italy},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :2
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84898713251&partnerID=40&md5=0b4c10f33eba6ba0100ad995078b9ef8}
    }
  • F. Djeghloul, F. Ibrahim, M. Cantoni, M. Bowen, L. Joly, S. Boukari, P. Ohresser, F. Bertran, P. Le Fvre, P. Thakur, F. Scheurer, T. Miyamachi, R. Mattana, P. Seneor, A. Jaafar, C. Rinaldi, S. Javaid, J. Arabski, J. -P. Kappler, W. Wulfhekel, N. B. Brookes, R. Bertacco, A. Taleb-Ibrahimi, M. Alouani, E. Beaurepaire, and W. Weber, “Direct observation of a highly spin-polarized organic spinterface at room temperature,” in Proceedings of SPIE – The International Society for Optical Engineering, Université de Ferhat Abbas Sétif 1, Faculté de Technologie, Sétif, Algeria, 2014, p. –.
    [Bibtex]
    @InProceedings{Djeghloul2014,
    Title = {Direct observation of a highly spin-polarized organic spinterface at room temperature},
    Author = {Djeghloul, F. and Ibrahim, F. and Cantoni, M. and Bowen, M. and Joly, L. and Boukari, S. and Ohresser, P. and Bertran, F. and Le Fvre, P. and Thakur, P. and Scheurer, F. and Miyamachi, T. and Mattana, R. and Seneor, P. and Jaafar, A. and Rinaldi, C. and Javaid, S. and Arabski, J. and Kappler, J.-P. and Wulfhekel, W. and Brookes, N.B. and Bertacco, R. and Taleb-Ibrahimi, A. and Alouani, M. and Beaurepaire, E. and Weber, W.},
    Booktitle = {Proceedings of SPIE - The International Society for Optical Engineering},
    Year = {2014},
    Address = {Université de Ferhat Abbas Sétif 1, Faculté de Technologie, Sétif, Algeria},
    Pages = {--},
    Volume = {9167},
    __markedentry = {[User:6]},
    Abstract = {Toward the design of large-scale electronic circuits that are entirely spintronics-driven, organic semiconductors have been identified as a promising medium to transport information using the electron spin. This requires a ferromagnetic metal-organic interface that is highly spin-polarized at and beyond room temperature, but this key building block is still lacking. We show how the interface between Co and phthalocyanine molecules constitutes a promising candidate. In fact, spin-polarized direct and inverse photoemission experiments reveal a high degree of spin polarization at room temperature at this interface. © 2014 SPIE.},
    Comment = {Export Date: 26 June 2015},
    Keywords = {Organic spintronics, Spin-polarized interface states, Spin-polarized photoemission spectroscopy},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84923061325&partnerID=40&md5=43e984e93c88a0b31759f6838516992d}
    }
  • G. Gervasoni, M. Carminati, G. Ferrari, M. Sampietro, E. Albisetti, D. Petti, P. Sharma, and R. Bertacco, “A 12-channel dual-lock-in platform for magneto-resistive DNA detection with ppm resolution,” in IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 – Proceedings, LNESS – Dipartimento di Fisica, Politecnico di Milano, Como, Italy, 2014, p. 316–319.
    [Bibtex]
    @InProceedings{Gervasoni2014,
    Title = {A 12-channel dual-lock-in platform for magneto-resistive DNA detection with ppm resolution},
    Author = {Gervasoni, G. and Carminati, M. and Ferrari, G. and Sampietro, M. and Albisetti, E. and Petti, D. and Sharma, P. and Bertacco, R.},
    Booktitle = {IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings},
    Year = {2014},
    Address = {LNESS - Dipartimento di Fisica, Politecnico di Milano, Como, Italy},
    Pages = {316--319},
    __markedentry = {[User:6]},
    Abstract = {Although lock-in detection is a well consolidated sensing technique, state-of-the-art commercial lock-in amplifiers do not allow reaching ppm resolution on long time scales due to low-frequency noise. We present a custom, multichannel platform that provides 0.7 ppm resolution, dedicated to pathogen DNA detection by means of Magnetic Tunnel Junction magneto-resistive sensors. A double modulation architecture (magnetic and electrical) is implemented in the FPGA that represents the core of the embedded digital processing unit. © 2014 IEEE.},
    Comment = {Export Date: 26 June 2015},
    Keywords = {DNA detection, lab-on-a-chip, lock-in amplifier, magneto-resistance, ppm resolution},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84920515751&partnerID=40&md5=55f1a0809c916648d39269d769c47ff8}
    }
  • D. Gutierrez, G. Radaelli, F. Sanchez, R. Bertacco, and J. Fontcuberta, “Bandwidth-limited control of orbital and magnetic orders in half-doped manganites by epitaxial strain,” , vol. 89, iss. 7, p. –, 2014.
    [Bibtex]
    @Article{GutiArrez2014,
    Title = {Bandwidth-limited control of orbital and magnetic orders in half-doped manganites by epitaxial strain},
    Author = {Gutierrez, D. and Radaelli, G. and Sanchez, F. and Bertacco, R. and Fontcuberta, J.},
    Year = {2014},
    Number = {7},
    Pages = {--},
    Volume = {89},
    __markedentry = {[User:6]},
    Abstract = {The magnetotransport phase diagram of half-doped manganites Ln0.5A0.5MnO3 (Ln=La3+, Nd3+, etc., and A=Sr2+, Ca2+, etc.) is primarily dictated by the bare conduction bandwith (W0), which itself is controlled by the Mn-O-Mn bond angle, and the carrier concentration. In thin films, epitaxial strain (ε) provides an additional tool to tune W0 by selecting orbital ordering at fixed carrier concentration. Here, we will show that compressive or tensile epitaxial strain on half-doped manganites can have a tremendous and distinct effect on La0.5Sr0.5MnO3 (LSMO5) and La0.5Ca0.5MnO3 (LCMO5), having broad or narrow W0, respectively. It is found that in LSMO5, large compressive strain triggers a change from a ferromagnetic and metallic ground state to an insulating and antiferromagnetic state whereas a tensile strain produces an antiferromagnetic but metallic state. In contrast, under strain, LCMO5 remains an antiferromagnetic insulator irrespectively of the strain state. These results illustrate that orbital ordering largely depends on the interplay between W0 and ε and provide a guideline towards responsive manganite layers. © 2014 American Physical Society.},
    Address = {LNESS, Dipartimento di Fisica, Politecnico di Milano, 22100 Como, Italy},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :2
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84894764366&partnerID=40&md5=dfbb51fc836a1ff61fa5474327dd4f8d}
    }
  • M. Monticelli, D. Petti, E. Albisetti, M. Cantoni, E. Guerriero, R. Sordan, M. Carminati, G. Ferrari, M. Sampietro, and R. Bertacco, “Closed loop microfluidic platform based on domain wall magnetic conduits: A novel tool for biology and medicine,” in Materials Research Society Symposium Proceedings, Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, P.zza L. Da Vinci 32, Milano, Italy, 2014, p. –.
    [Bibtex]
    @InProceedings{Monticelli2014,
    Title = {Closed loop microfluidic platform based on domain wall magnetic conduits: A novel tool for biology and medicine},
    Author = {Monticelli, M. and Petti, D. and Albisetti, E. and Cantoni, M. and Guerriero, E. and Sordan, R. and Carminati, M. and Ferrari, G. and Sampietro, M. and Bertacco, R.},
    Booktitle = {Materials Research Society Symposium Proceedings},
    Year = {2014},
    Address = {Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, P.zza L. Da Vinci 32, Milano, Italy},
    Pages = {--},
    Volume = {1686},
    __markedentry = {[User:6]},
    Abstract = {In this paper we present an innovative on-chip platform suitable for the simultaneous manipulation and detection of the transit of a single magnetic bead. This system is based on the controlled displacement of constrained magnetic domain walls (DWs) that are used to move and sense particles in suspension over the chip. To this scope, the high stray field from the transverse DWs created at the corners of ferromagnetic zig-zag structures is used for particles manipulation, while electrical contacts flanking a single corner are employed to simultaneously monitor the DW passage through that corner, via anisotropic magneto resistance (AMR) measurements. A single DW carrying a magnetic particle is nucleated and manipulated within the zig-zag shaped magnetic conduit, trough the action of external magnetic fields. At the same time, the variation of the voltage drop across a corner flanked by a pair of electrical leads is measured, allowing to detect the transit of the DW thanks to the change of the relative orientation of current and spins at the corner related to the peculiar micromagnetic configuration of the DW (AMR). Work is in progress in order to selectively distinguish the transit of a naked DW from that of a DW bound to a magnetic particle. This work paves the way to the development of a closed-loop microlfuidic platform for on-chip bead manipulation, where single bead can be finely moved and their motion continuously checked, via AMR electrical detection and without need of optical monitoring, in a fully integrated closed-loop system. Copyright © Materials Research Society 2014Â.},
    Comment = {Export Date: 26 June 2015},
    Keywords = {magnetoresistance (magnetic), magnetoresistance (transport), nanostructure},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84924408431&partnerID=40&md5=63b6b01b70a9723ac1609367aee162a5}
    }
  • M. Monticelli, D. Petti, E. Albisetti, M. Cantoni, E. Guerriero, R. Sordan, M. Carminati, G. Ferrari, M. Sampietro, and R. Bertacco, “Closed loop microfluidic platform based on domain wall magnetic conduits: A novel tool for biology and medicine,” , vol. 1686, iss. 6, p. –, 2014.
    [Bibtex]
    @Article{Monticelli2014a,
    Title = {Closed loop microfluidic platform based on domain wall magnetic conduits: A novel tool for biology and medicine},
    Author = {Monticelli, M. and Petti, D. and Albisetti, E. and Cantoni, M. and Guerriero, E. and Sordan, R. and Carminati, M. and Ferrari, G. and Sampietro, M. and Bertacco, R.},
    Year = {2014},
    Number = {6},
    Pages = {--},
    Volume = {1686},
    __markedentry = {[User:6]},
    Abstract = {In this paper we present an innovative on-chip platform suitable for the simultaneous manipulation and detection of the transit of a single magnetic bead. This system is based on the controlled displacement of constrained magnetic domain walls (DWs) that are used to move and sense particles in suspension over the chip. To this scope, the high stray field from the transverse DWs created at the corners of ferromagnetic zig-zag structures is used for particles manipulation, while electrical contacts flanking a single corner are employed to simultaneously monitor the DW passage through that corner, via anisotropic magneto resistance (AMR) measurements. A single DW carrying a magnetic particle is nucleated and manipulated within the zig-zag shaped magnetic conduit, trough the action of external magnetic fields. At the same time, the variation of the voltage drop across a corner flanked by a pair of electrical leads is measured, allowing to detect the transit of the DW thanks to the change of the relative orientation of current and spins at the corner related to the peculiar micromagnetic configuration of the DW (AMR). Work is in progress in order to selectively distinguish the transit of a naked DW from that of a DW bound to a magnetic particle. This work paves the way to the development of a closed-loop microlfuidic platform for on-chip bead manipulation, where single bead can be finely moved and their motion continuously checked, via AMR electrical detection and without need of optical monitoring, in a fully integrated closed-loop system. Copyright © 2014 Materials Research Society.},
    Address = {Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, P.zza L. Da Vinci 32, Milano, Italy},
    Booktitle = {Disaster Medicine and Public Health Preparedness},
    Comment = {Export Date: 26 June 2015},
    Keywords = {magnetoresistance (magnetic), magnetoresistance (transport), nanostructure},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84911955690&partnerID=40&md5=f8d505bb406c3448dcf1fe778bf338d9}
    }
  • D. Petti, A. Torti, F. Damin, L. Sola, M. Rusnati, E. Albisetti, A. Bugatti, R. Bertacco, and M. Chiari, “Functionalization of gold surfaces with copoly(DMA-NAS-MAPS) by dip coating: Surface characterization and hybridization tests,” , vol. 190, p. 234–242, 2014.
    [Bibtex]
    @Article{Petti2014,
    Title = {Functionalization of gold surfaces with copoly(DMA-NAS-MAPS) by dip coating: Surface characterization and hybridization tests},
    Author = {Petti, D. and Torti, A. and Damin, F. and Sola, L. and Rusnati, M. and Albisetti, E. and Bugatti, A. and Bertacco, R. and Chiari, M.},
    Year = {2014},
    Pages = {234--242},
    Volume = {190},
    __markedentry = {[User:6]},
    Abstract = {In this work, a new method to functionalize a gold surface by dip coating with a functional copolymer is presented. The coating procedure is simple, robust and can be accomplished in less than one hour. Atomic force microscopy (AFM) scratch tests reveal the presence of a homogeneous polymer coating with a thickness of 2.5 nm. X-ray photoemission spectroscopy spectra from C1s, N1s and O1s levels present the typical fingerprints of the polymeric overlayer, i.e. the characteristic peaks from CNCO and NCO groups. Surface plasmon resonance (SPR) binding assays were used to check the coating functional properties. Immobilization of heparin to SPR gold surfaces functionalized with copoly(DMA-NAS-MAPS)- followed by binding analysis with the well known heparin binding protein fibroblast growth factor 2 yield binding kinetic parameters comparable to those obtained with commercially available carboxymethyl dextran-functionalized sensorchips, thus confirming the great potential of the proposed technique. © 2013 Elsevier B.V. All rights reserved.},
    Address = {Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy},
    Booktitle = {Sensors and Actuators, B: Chemical},
    Comment = {Cited By :1
    Export Date: 26 June 2015},
    Keywords = {Atomic force microscopy, Chemiluminescence, Copoly(DMA-NAS-MAPS), Gold functionalization, Surface plasmon resonance, X-ray photoemission spectroscopy},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84884545436&partnerID=40&md5=eac700d85327df40506b1b61273a95d5}
    }
  • G. Radaelli, M. Cantoni, L. Lijun, M. Espahbodi, and R. Bertacco, “Two dimensional growth of ultrathin Fe films on BaTiO3 with sharp chemical interface,” , vol. 115, iss. 6, p. –, 2014.
    [Bibtex]
    @Article{Radaelli2014,
    Title = {Two dimensional growth of ultrathin Fe films on BaTiO3 with sharp chemical interface},
    Author = {Radaelli, G. and Cantoni, M. and Lijun, L. and Espahbodi, M. and Bertacco, R.},
    Year = {2014},
    Number = {6},
    Pages = {--},
    Volume = {115},
    __markedentry = {[User:6]},
    Abstract = {The Fe/BaTiO3 interface is a prototypical artificial multiferroic system displaying purely electronic magnetoelectric effects at room temperature. As magneto-electric coupling is essentially localized at the interface, the properties of the very first Fe layers in contact with BaTiO 3 play a major role. In this paper, we investigate, by using X-ray photoemission spectroscopy and photoelectron diffraction, the in-situ growth, by molecular beam epitaxy, of ultrathin Fe films (∼7 monolayers) on a BaTiO3/SrTiO3(001) template. We found that growing the Fe films above room temperature (373K) is essential in order to avoid island growth and obtain a continuous film. Post-annealing up to 473K improves the film crystallinity but prevents chemical interdiffusion and roughening. Just an interfacial monolayer of oxidized iron is detected in these conditions, which appears as an unavoidable consequence of the Fe/BaTiO3 chemical interaction. Its active role in magnetoelectric coupling must be carefully taken into account to correlate theoretical predictions and experiments. © 2014 AIP Publishing LLC.},
    Address = {Institute of Solid State Physics, Key Laboratory of Materials Physics, Chinese Academy of Sciences, Hefei 230031, China},
    Booktitle = {Journal of Applied Physics},
    Comment = {Cited By :2
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84903775795&partnerID=40&md5=3c0314d10b76a900ee2a54ad931db433}
    }
  • G. Radaelli, D. Petti, M. Cantoni, C. Rinaldi, and R. Bertacco, “Absence of strain-mediated magnetoelectric coupling at fully epitaxial Fe/BaTiO3 interface (invited),” , vol. 115, iss. 17, p. –, 2014.
    [Bibtex]
    @Article{Radaelli2014b,
    Title = {Absence of strain-mediated magnetoelectric coupling at fully epitaxial Fe/BaTiO3 interface (invited)},
    Author = {Radaelli, G. and Petti, D. and Cantoni, M. and Rinaldi, C. and Bertacco, R.},
    Year = {2014},
    Number = {17},
    Pages = {--},
    Volume = {115},
    __markedentry = {[User:6]},
    Abstract = {Interfacial MagnetoElectric coupling (MEC) at ferroelectric/ferromagnetic interfaces has recently emerged as a promising route to achieve electrical writing of magnetic information in spintronic devices. For the prototypical Fe/BaTiO3 (BTO) system, various MEC mechanisms have been theoretically predicted. Experimentally, it is well established that using BTO single crystal substrates MEC is dominated by strain-mediated mechanisms. In case of ferromagnetic layers epitaxially grown onto BTO films, instead, no direct evidence for MEC has been provided, apart from the results obtained on tunneling junction sandwiching a BTO tunneling barrier. In this paper, MEC at fully epitaxial Fe/BTO interface is investigated by Magneto-Optical Kerr Effect and magnetoresistance measurements on magnetic tunnel junctions fabricated on BTO. We find no evidence for strain-mediated MEC mechanisms in epitaxial systems, likely due to clamping of BTO to the substrate. Our results indicate that pure electronic MEC is the route of choice to be explored for achieving the electrical writing of information in epitaxial ferromagnet-ferroelectric heterostructures. © 2014 AIP Publishing LLC.},
    Address = {LNESS Center, Dipartimento di Fisica, Politecnico di Milano, Como 22100, Italy},
    Booktitle = {Journal of Applied Physics},
    Comment = {Cited By :1
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84903890642&partnerID=40&md5=6b34b4715229ad89b6e0d787383a57d7}
    }
  • G. Radaelli, D. Petti, E. Plekhanov, I. Fina, P. Torelli, B. R. Salles, M. Cantoni, C. Rinaldi, D. Gutierrez, G. Panaccione, M. Varela, S. Picozzi, J. Fontcuberta, and R. Bertacco, “Electric control of magnetism at the Fe/BaTiO3interface,” , vol. 5, p. –, 2014.
    [Bibtex]
    @Article{Radaelli2014a,
    Title = {Electric control of magnetism at the Fe/BaTiO3interface},
    Author = {Radaelli, G. and Petti, D. and Plekhanov, E. and Fina, I. and Torelli, P. and Salles, B.R. and Cantoni, M. and Rinaldi, C. and Gutierrez, D. and Panaccione, G. and Varela, M. and Picozzi, S. and Fontcuberta, J. and Bertacco, R.},
    Year = {2014},
    Pages = {--},
    Volume = {5},
    __markedentry = {[User:6]},
    Abstract = {Interfacial magnetoelectric coupling is a viable path to achieve electrical writing of magnetic information in spintronic devices. For the prototypical Fe/BaTiO3system, only tiny changes of the interfacial Fe magnetic moment upon reversal of the BaTiO3dielectric polarization have been predicted so far. Here, by using X-ray magnetic circular dichroism in combination with high-resolution electron microscopy and first principles calculations, we report on an undisclosed physical mechanism for interfacial magnetoelectric coupling in the Fe/BaTiO3system. At this interface, an ultrathin oxidized iron layer exists, whose magnetization can be electrically and reversibly switched on and off at room temperature by reversing the BaTiO3polarization. The suppression/recovery of interfacial ferromagnetism results from the asymmetric effect that ionic displacements in BaTiO3produces on the exchange coupling constants in the interfacial-oxidized Fe layer. The observed giant magnetoelectric response holds potential for optimizing interfacial magnetoelectric coupling in view of efficient, low-power spintronic devices. © 2014 Macmillan Publishers Limited.},
    Address = {Departamento Fisica Aplicada III, Universidad Complutense de Madrid, Madrid, Spain},
    Booktitle = {Nature Communications},
    Comment = {Cited By :14
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84903893862&partnerID=40&md5=db8bbc8cd1079e3c46123f0d12edd972}
    }
  • C. Rinaldi, S. Bertoli, M. Cantoni, C. Manzoni, M. Marangoni, G. Cerullo, M. Bianchi, R. Sordan, and R. Bertacco, “Determination of spin diffusion length in Germanium by optical and electrical spin injection,” in Proceedings of SPIE – The International Society for Optical Engineering, L-NESS and CNISM, Dipartimento di Fisica, Politecnico di Milano, Via Anzani 42, Como, Italy, 2014, p. –.
    [Bibtex]
    @InProceedings{Rinaldi2014,
    Title = {Determination of spin diffusion length in Germanium by optical and electrical spin injection},
    Author = {Rinaldi, C. and Bertoli, S. and Cantoni, M. and Manzoni, C. and Marangoni, M. and Cerullo, G. and Bianchi, M. and Sordan, R. and Bertacco, R.},
    Booktitle = {Proceedings of SPIE - The International Society for Optical Engineering},
    Year = {2014},
    Address = {L-NESS and CNISM, Dipartimento di Fisica, Politecnico di Milano, Via Anzani 42, Como, Italy},
    Pages = {--},
    Volume = {9167},
    __markedentry = {[User:6]},
    Abstract = {We report on the measurements of spin diffusion length and lifetime in Germanium with both magneto-electro-optical and magneto-electrical techniques. Magneto-electro-optical measurements were made by optically inject in Fe/MgO/Ge spin-photodiodes a spin polarized population around the T point of the Brillouin zone of Ge at different photon energies. The spin diffusion length is obtained by fitting by a mathematical model the photon energy dependence of the spin signal, due to switching of the light polarization from left to right, leading to a spin diffusion length of 0.9±0.2 μm at room temperature. Non-local four-terminals and Hanle measurements performed on Fe/MgO/Ge lateral devices, at room temperature, instead lead to 1.2±0.2 μm. The compatibility of these values among the different measurement methods validates the use all of all of them to determine the spin diffusion length in semiconductors. While electrical methods are well known in semiconductor spintronics, in this work we demonstrate that the optical pumping versus photon energy is an alternative and reliable method for the determination of the spin diffusion length whereas the band structure of the semiconductor allows for a non-negligible optical spin orientation. © 2014 SPIE.},
    Comment = {Export Date: 26 June 2015},
    Keywords = {Germanium, Hanle effect, Optical spin orientation, Spin diffusion length, Spin lifetime, Spin-optoelectronics, Spintronics},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84923065847&partnerID=40&md5=4acea8491dc9f2b735434bf88fc93e34}
    }
  • C. Rinaldi, M. Cantoni, M. Marangoni, C. Manzoni, G. Cerullo, and R. Bertacco, “Wide-range optical spin orientation in Ge from near-infrared to visible light,” , vol. 90, iss. 16, p. –, 2014.
    [Bibtex]
    @Article{Rinaldi2014a,
    Title = {Wide-range optical spin orientation in Ge from near-infrared to visible light},
    Author = {Rinaldi, C. and Cantoni, M. and Marangoni, M. and Manzoni, C. and Cerullo, G. and Bertacco, R.},
    Year = {2014},
    Number = {16},
    Pages = {--},
    Volume = {90},
    __markedentry = {[User:6]},
    Abstract = {Ge-based spin-photodiodes have been employed to investigate the spectral dependence of optical spin orientation in germanium, in the range 400-1550 nm. We found the expected maximum in the spin polarization of photocarriers for excitation at the direct gap in Γ (1550 nm) and a second sizable peak due to photogeneration in the L valleys (530 nm). Data suggest distinct spin depolarization mechanisms for excitation at Γ and L, with shorter spin relaxation times whether the X point is involved. These devices can be used as integrated photon-helicity detectors over a wide spectral range. © 2014 American Physical Society.},
    Address = {Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milan, Italy},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :1
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84908042230&partnerID=40&md5=6df47480cfd28c844c8db39dbc4ccac2}
    }
  • M. Savoini, C. Piovera, C. Rinaldi, E. Albisetti, D. Petti, A. R. Khorsand, L. Du, C. Dallera, M. Cantoni, R. Bertacco, M. Finazzi, E. Carpene, A. V. Kimel, A. Kirilyuk, and T. Rasing, “Bias-controlled ultrafast demagnetization in magnetic tunnel junctions,” , vol. 89, iss. 14, p. –, 2014.
    [Bibtex]
    @Article{Savoini2014,
    Title = {Bias-controlled ultrafast demagnetization in magnetic tunnel junctions},
    Author = {Savoini, M. and Piovera, C. and Rinaldi, C. and Albisetti, E. and Petti, D. and Khorsand, A.R. and Du, L. and Dallera, C. and Cantoni, M. and Bertacco, R. and Finazzi, M. and Carpene, E. and Kimel, A.V. and Kirilyuk, A. and Rasing, T.},
    Year = {2014},
    Number = {14},
    Pages = {--},
    Volume = {89},
    __markedentry = {[User:6]},
    Abstract = {We report on the possibility of controlling the maximum demagnetization induced by a femtosecond laser pulse in a CoFeB-based magnetic tunnel junction, by tuning the external bias applied to the junction. We explain this effect in terms of laser-induced spin-polarized currents which can be controlled by tuning the conductivity of the junction. This demonstrates the contribution of spin-polarized currents for laser-induced demagnetization and may pave the way to increase the speed of spintronic devices, using ultrashort laser pulses. © 2014 American Physical Society.},
    Address = {IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :1
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84899769579&partnerID=40&md5=c3fa29a576f739ad5c97aa7057bebbdb}
    }

2013

  • E. Albisetti, D. Petti, M. Cantoni, F. Damin, A. Torti, M. Chiari, and R. Bertacco, “Conditions for efficient on-chip magnetic bead detection via magnetoresistive sensors,” , vol. 47, p. 213–217, 2013.
    [Bibtex]
    @Article{Albisetti2013,
    Title = {Conditions for efficient on-chip magnetic bead detection via magnetoresistive sensors},
    Author = {Albisetti, E. and Petti, D. and Cantoni, M. and Damin, F. and Torti, A. and Chiari, M. and Bertacco, R.},
    Year = {2013},
    Pages = {213--217},
    Volume = {47},
    __markedentry = {[User:6]},
    Abstract = {A commonly used figure of merit of magnetoresistive sensors employed to detect magnetic beads labeling biomolecules in lab-on-chip applications is the sensor sensitivity (S0) to external magnetic fields in the linear region of the sensor. In this paper we show that, in case of lock-in detection and bead excitation by a small AC magnetic field, S0 is not the good figure of merit to optimize. Indeed, the highest sensitivity to the magnetic beads is achieved biasing the sensor in the region of its characteristics where the product between the DC bias field and the second derivative of the resistance with respect to the magnetic field is maximum. The validity of this criterion, derived from a phenomenological model of bead detection, is proved in case of magnetic tunneling junction sensors detecting magnetic beads with 250nm diameter. This work paves the way to the development of a new generation of sensors properly designed to maximize the bead sensitivity. © 2013 Elsevier B.V.},
    Address = {Istituto di Chimica del Riconoscimento Molecolare, CNR, Via Mario Bianco 9, 20131 Milan, Italy},
    Booktitle = {Biosensors and Bioelectronics},
    Comment = {Cited By :10
    Export Date: 26 June 2015},
    Keywords = {Magnetic bead, Magnetic biosensor, Magnetic tunneling junction},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84876329725&partnerID=40&md5=cde2047f41ad1b40fce8db0c266a253e}
    }
  • E. Albisetti, D. Petti, F. Damin, M. Cretich, M. Bagnati, L. Sola, M. Chiari, and R. Bertacco, “Optimization of the bio-functionalized area of magnetic biosensors,” , vol. 86, iss. 6, p. –, 2013.
    [Bibtex]
    @Article{Albisetti2013a,
    Title = {Optimization of the bio-functionalized area of magnetic biosensors},
    Author = {Albisetti, E. and Petti, D. and Damin, F. and Cretich, M. and Bagnati, M. and Sola, L. and Chiari, M. and Bertacco, R.},
    Year = {2013},
    Number = {6},
    Pages = {--},
    Volume = {86},
    __markedentry = {[User:6]},
    Abstract = {In this work, calculations and preliminary experimental data for determining the optimal condition for the selective bio-functionalization of magnetic tunneling junction (MTJ)-based biosensors are presented. Results on the detection of biomolecular recognition events employing MTJ-based sensor and magnetic beads are presented and interpreted through calculations, taking into account the dependence of the signal on the distribution of the beads with respect to the sensor. Furthermore, it is demonstrated by calculations that a significant increase in the sensor sensitivity and quantification capability can be achieved by selectively bio-functionalizing an area which corresponds to the sensor active area. © 2013 EDP Sciences, Società Italiana di Fisica, Springer-Verlag.},
    Address = {Istituto di Chimica Del Riconoscimento Molecolare, CNR, Via Mario Bianco 9, 20131 Milan, Italy},
    Booktitle = {European Physical Journal B},
    Comment = {Cited By :1
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84898891650&partnerID=40&md5=aeba9652ac8584db16eecab5fd20aff0}
    }
  • D. Di Sante, P. Barone, R. Bertacco, and S. Picozzi, “Electric control of the giant rashba effect in bulk gete,” , vol. 25, iss. 4, p. 509–513, 2013.
    [Bibtex]
    @Article{DiSante2013,
    Title = {Electric control of the giant rashba effect in bulk gete},
    Author = {Di Sante, D. and Barone, P. and Bertacco, R. and Picozzi, S.},
    Year = {2013},
    Number = {4},
    Pages = {509--513},
    Volume = {25},
    __markedentry = {[User:6]},
    Abstract = {Relativistic effects, including the Rashba effect, are increasingly seen as key ingredients in spintronics. A link between Rashba physics and the field of ferroelectrics is established by predicting giant Rashba spin-splitting in bulk GeTe (see the Figure showing the band-structure as well as in-plane and out- of-plane spin polarization for a constant energy cut). Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.},
    Address = {LNESS Dipartimento di Fisica Politecnico di Milano, Via Anzani 42, 22100 Como, Italy},
    Booktitle = {Advanced Materials},
    Comment = {Cited By :20
    Export Date: 26 June 2015},
    Keywords = {ferroelectric, GeTe, rashba effect, spintronics},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84872727273&partnerID=40&md5=6459e337f184430ef71f2b215f4db632}
    }
  • D. Di Sante, P. Barone, R. Bertacco, and S. Picozzi, “Erratum: Electric control of the giant rashba effect in bulk GeTe (Advanced Materials (2013) 25 (509-513) DOI: 10.1002/adma.201203199),” , vol. 25, iss. 27, p. 3625–3626, 2013.
    [Bibtex]
    @Article{DiSante2013a,
    Title = {Erratum: Electric control of the giant rashba effect in bulk GeTe (Advanced Materials (2013) 25 (509-513) DOI: 10.1002/adma.201203199)},
    Author = {Di Sante, D. and Barone, P. and Bertacco, R. and Picozzi, S.},
    Year = {2013},
    Number = {27},
    Pages = {3625--3626},
    Volume = {25},
    __markedentry = {[User:6]},
    Booktitle = {Advanced Materials},
    Comment = {Cited By :2
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84880178660&partnerID=40&md5=a5fc0a8b597e03959bba856717162f99}
    }
  • F. Djeghloul, F. Ibrahim, M. Cantoni, M. Bowen, L. Joly, S. Boukari, P. Ohresser, F. Bertran, P. Le Fèvre, P. Thakur, F. Scheurer, T. Miyamachi, R. Mattana, P. Seneor, A. Jaafar, C. Rinaldi, S. Javaid, J. Arabski, J. -P. Kappler, W. Wulfhekel, N. B. Brookes, R. Bertacco, A. Taleb-Ibrahimi, M. Alouani, E. Beaurepaire, and W. Weber, “Direct observation of a highly spin-polarized organic spinterface at room temperature,” , vol. 3, p. –, 2013.
    [Bibtex]
    @Article{Djeghloul2013,
    Title = {Direct observation of a highly spin-polarized organic spinterface at room temperature},
    Author = {Djeghloul, F. and Ibrahim, F. and Cantoni, M. and Bowen, M. and Joly, L. and Boukari, S. and Ohresser, P. and Bertran, F. and Le Fèvre, P. and Thakur, P. and Scheurer, F. and Miyamachi, T. and Mattana, R. and Seneor, P. and Jaafar, A. and Rinaldi, C. and Javaid, S. and Arabski, J. and Kappler, J.-P. and Wulfhekel, W. and Brookes, N.B. and Bertacco, R. and Taleb-Ibrahimi, A. and Alouani, M. and Beaurepaire, E. and Weber, W.},
    Year = {2013},
    Pages = {--},
    Volume = {3},
    __markedentry = {[User:6]},
    Abstract = {Organic semiconductors constitute promising candidates toward large-scale electronic circuits that are entirely spintronics-driven. Toward this goal, tunneling magnetoresistance values above 300% at low temperature suggested the presence of highly spin-polarized device interfaces. However, such spinterfaces have not been observed directly, let alone at room temperature. Thanks to experiments and theory on the model spinterface between phthalocyanine molecules and a Co single crystal surface, we clearly evidence a highly efficient spinterface. Spin-polarised direct and inverse photoemission experiments reveal a high degree of spin polarisation at room temperature at this interface. We measured a magnetic moment on the molecule's nitrogen π orbitals, which substantiates an ab-initio theoretical description of highly spin-polarised charge conduction across the interface due to differing spinterface formation mechanisms in each spin channel. We propose, through this example, a recipe to engineer simple organic-inorganic interfaces with remarkable spintronic properties that can endure well above room temperature.},
    Address = {L'Université de Paris-Sud, 91405 Orsay, France},
    Booktitle = {Scientific Reports},
    Comment = {Cited By :16
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84874306531&partnerID=40&md5=98ce603932041cf9b2a33ee25fcb4e6c}
    }
  • D. Petti, E. Albisetti, H. Reichlova, J. Gazquez, M. Varela, M. Molina-Ruiz, A. F. Lopeandia, K. Olejnik, V. Novak, I. Fina, B. Dkhil, J. Hayakawa, X. Marti, J. Wunderlich, T. Jungwirth, and R. Bertacco, “Storing magnetic information in IrMn/MgO/Ta tunnel junctions via field-cooling,” , vol. 102, iss. 19, p. –, 2013.
    [Bibtex]
    @Article{Petti2013,
    Title = {Storing magnetic information in IrMn/MgO/Ta tunnel junctions via field-cooling},
    Author = {Petti, D. and Albisetti, E. and Reichlova, H. and Gazquez, J. and Varela, M. and Molina-Ruiz, M. and Lopeandia, A.F. and Olejnik, K. and Novak, V. and Fina, I. and Dkhil, B. and Hayakawa, J. and Marti, X. and Wunderlich, J. and Jungwirth, T. and Bertacco, R.},
    Year = {2013},
    Number = {19},
    Pages = {--},
    Volume = {102},
    __markedentry = {[User:6]},
    Abstract = {In this paper, we demonstrate that in Ta/MgO/IrMn tunneling junctions, containing no ferromagnetic elements, distinct metastable resistance states can be set by field cooling the devices from above the Néel temperature (TN) along different orientations. Variations of the resistance up to 10 are found upon field cooling in applied fields, in-plane or out-of-plane. Well below TN, these metastable states are insensitive to magnetic fields up to 2 T, thus constituting robust memory states. Our work provides the demonstration of an electrically readable magnetic memory device, which contains no ferromagnetic elements and stores the information in an antiferromagnetic active layer. © 2013 AIP Publishing LLC.},
    Address = {Universidad Complutense de Madrid, Madrid 28040, Spain},
    Booktitle = {Applied Physics Letters},
    Comment = {Cited By :8
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84877978965&partnerID=40&md5=eba32cb7c2eb230148bb16af9680576e}
    }
  • P. Wadley, V. Novak, R. P. Campion, C. Rinaldi, X. Marti, H. Reichlova, J. Zelezny, J. Gazquez, M. A. Roldan, M. Varela, D. Khalyavin, S. Langridge, D. Kriegner, F. Maca, J. Masek, R. Bertacco, V. Holy, A. W. Rushforth, K. W. Edmonds, B. L. Gallagher, C. T. Foxon, J. Wunderlich, and T. Jungwirth, “Tetragonal phase of epitaxial room-temperature antiferromagnet CuMnAs,” , vol. 4, p. –, 2013.
    [Bibtex]
    @Article{Wadley2013,
    Title = {Tetragonal phase of epitaxial room-temperature antiferromagnet CuMnAs},
    Author = {Wadley, P. and Novak, V. and Campion, R.P. and Rinaldi, C. and Marti, X. and Reichlova, H. and Zelezny, J. and Gazquez, J. and Roldan, M.A. and Varela, M. and Khalyavin, D. and Langridge, S. and Kriegner, D. and Maca, F. and Masek, J. and Bertacco, R. and Holy, V. and Rushforth, A.W. and Edmonds, K.W. and Gallagher, B.L. and Foxon, C.T. and Wunderlich, J. and Jungwirth, T.},
    Year = {2013},
    Pages = {--},
    Volume = {4},
    __markedentry = {[User:6]},
    Abstract = {Recent studies have demonstrated the potential of antiferromagnets as the active component in spintronic devices. This is in contrast to their current passive role as pinning layers in hard disk read heads and magnetic memories. Here we report the epitaxial growth of a new high-temperature antiferromagnetic material, tetragonal CuMnAs, which exhibits excellent crystal quality, chemical order and compatibility with existing semiconductor technologies. We demonstrate its growth on the III-V semiconductors GaAs and GaP, and show that the structure is also lattice matched to Si. Neutron diffraction shows collinear antiferromagnetic order with a high Néel temperature. Combined with our demonstration of room-temperature-exchange coupling in a CuMnAs/Fe bilayer, we conclude that tetragonal CuMnAs films are suitable candidate materials for antiferromagnetic spintronics. © 2013 Macmillan Publishers Limited.},
    Address = {Hitachi Cambridge Laboratory, Cambridge CB3 0HE, United Kingdom},
    Booktitle = {Nature Communications},
    Comment = {Cited By :9
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84883170714&partnerID=40&md5=023681388bef9dcbd03ac8756ad1d8be}
    }

2012

  • R. Bertacco and F. Ciccacci, “Oxide Films in Spintronics,” in Oxide Ultrathin Films, Politecnico di Milano, LNESS, Dipartimento di Fisica, Via Anzani 42, piazza L. da Vinci 32, Como, Milano, 20100, 20133, Italy: , 2012, p. 181–200.
    [Bibtex]
    @InCollection{Bertacco2012,
    Title = {Oxide Films in Spintronics},
    Author = {Bertacco, R. and Ciccacci, F.},
    Booktitle = {Oxide Ultrathin Films},
    Year = {2012},
    Address = {Politecnico di Milano, LNESS, Dipartimento di Fisica, Via Anzani 42, piazza L. da Vinci 32, Como, Milano, 20100, 20133, Italy},
    Pages = {181--200},
    __markedentry = {[User:6]},
    Comment = {Export Date: 26 June 2015},
    Keywords = {Ferromagnetic materials, Hysteresis, Magentoresistance, Molecular beam epitaxy, Multiferroic materials, Multilayers, Pulsed laser deposition, Spin polarization, Spintronics, Tunneling},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84882883073&partnerID=40&md5=f88dd5c41fb970f5e9a699263669bc37}
    }
  • S. Brivio, D. Polli, A. Crespi, R. Osellame, G. Cerullo, and R. Bertacco, “Response to Comment on Observation of anomalous acoustic phonon dispersion in SrTiO 3 by broadband stimulated Brillouin scattering’ (Appl. Phys. Lett. (2012) 100 (206101)),” , vol. 100, iss. 20, p. –, 2012.
    [Bibtex]
    @Article{Brivio2012,
    Title = {Response to Comment on Observation of anomalous acoustic phonon dispersion in SrTiO 3 by broadband stimulated Brillouin scattering' (Appl. Phys. Lett. (2012) 100 (206101))},
    Author = {Brivio, S. and Polli, D. and Crespi, A. and Osellame, R. and Cerullo, G. and Bertacco, R.},
    Year = {2012},
    Number = {20},
    Pages = {--},
    Volume = {100},
    __markedentry = {[User:6]},
    Address = {LNESS, CNISM, Dipartimento di Fisica, Via Anzani 42, 22100 Como, Italy},
    Booktitle = {Applied Physics Letters},
    Comment = {Cited By :1
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84861810388&partnerID=40&md5=fbb5796127d4907eb3c7e0e2a3619c79}
    }
  • M. Cantoni, R. Bertacco, A. Brambilla, M. Finazzi, L. Du, F. Ciccacci, A. Verdini, L. Floreano, A. Morgante, M. Passoni, C. S. Casari, and A. Li Bassi, “Fe nanoparticles on ZnSe: Reversible temperature dependence of the surface barrier potential,” , vol. 85, iss. 15, p. –, 2012.
    [Bibtex]
    @Article{Cantoni2012,
    Title = {Fe nanoparticles on ZnSe: Reversible temperature dependence of the surface barrier potential},
    Author = {Cantoni, M. and Bertacco, R. and Brambilla, A. and Finazzi, M. and Du, L. and Ciccacci, F. and Verdini, A. and Floreano, L. and Morgante, A. and Passoni, M. and Casari, C.S. and Li Bassi, A.},
    Year = {2012},
    Number = {15},
    Pages = {--},
    Volume = {85},
    __markedentry = {[User:6]},
    Abstract = {The Fe growth on ZnSe(001) takes place via the initial formation of superparamagnetic nano-islands that subsequently coalesce, giving rise to a continuous film for a nominal thickness of 8 Fe monolayers. For a very low Fe coverage (2 Fe monolayers), we show that the surface barrier potential (i.e. the barrier potential seen by electrons incident on the surface), measured by absorbed current spectroscopy, attains very large values (6.9 eV at room temperature) and dramatically changes as a function of temperature, with an increase of ∼1.5 eV from room temperature down to 130 K, largely exceeding similar changes observed in both thin films and nanoparticles. This phenomenon disappears as the thickness increases and is fully reversible with temperature. Nonequilibrium phenomena due to the experimental conditions are present, but are not able to explain the observed data. Inverse photoemission, core level photoemission, x-ray photoemission diffraction, and scanning tunneling microscopy are employed in order to find temperature-dependent properties of the Fe islands: while only minor changes as a function of temperature are present in the electronic band structure, the Fe crystal structure, and the morphology of the islands, a noticeable temperature dependence of the Se segregation through the Fe islands is found. © 2012 American Physical Society.},
    Address = {Center for Nano Science and Technology at Polimi, Istituto Italiano di Tecnologia, via Pascoli 70/3, 20133 Milano, Italy},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84860428507&partnerID=40&md5=72fd89d92808f79415708d26fdf75d64}
    }
  • M. Pernia Leal, A. Torti, A. Riedinger, R. La Fleur, D. Petti, R. Cingolani, R. Bertacco, and T. Pellegrino, “Controlled release of doxorubicin loaded within magnetic thermo-responsive nanocarriers under magnetic and thermal actuation in a microfluidic channel,” , vol. 6, iss. 12, p. 10535–10545, 2012.
    [Bibtex]
    @Article{PerniaLeal2012,
    Title = {Controlled release of doxorubicin loaded within magnetic thermo-responsive nanocarriers under magnetic and thermal actuation in a microfluidic channel},
    Author = {Pernia Leal, M. and Torti, A. and Riedinger, A. and La Fleur, R. and Petti, D. and Cingolani, R. and Bertacco, R. and Pellegrino, T.},
    Year = {2012},
    Number = {12},
    Pages = {10535--10545},
    Volume = {6},
    __markedentry = {[User:6]},
    Abstract = {We report a procedure to grow thermo-responsive polymer shells at the surface of magnetic nanocarriers made of multiple iron oxide superparamagnetic nanoparticles embedded in poly(maleic anhydride-alt-1-ocatadecene) polymer nanobeads. Depending on the comonomers and on their relative composition, tunable phase transition temperatures in the range between 26 and 47 C under physiological conditions could be achieved. Using a suitable microfluidic platform combining magnetic nanostructures and channels mimicking capillaries of the circulatory system, we demonstrate that thermo-responsive nanobeads are suitable for localized drug delivery with combined thermal and magnetic activation. Below the critical temperature nanobeads are stable in suspension, retain their cargo, and cannot be easily trapped by magnetic fields. Increasing the temperature above the critical temperature causes the aggregation of nanobeads, forming clusters with a magnetic moment high enough to permit their capture by suitable magnetic gradients in close proximity to the targeted zone. At the same time the polymer swelling activates drug release, with characteristic times on the order of one hour for flow rates of the same order as those of blood in capillaries. © 2012 American Chemical Society.},
    Address = {National Nanotechnology Laboratory of CNR-NANO, Via per Arnesano km 5, 73100 Lecce, Italy},
    Booktitle = {ACS Nano},
    Comment = {Cited By :17
    Export Date: 26 June 2015},
    Keywords = {biomedical applications, drug delivery, magnetic nanoparticles, microfluids, thermo-responsive},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84871530963&partnerID=40&md5=8b16e59ecf554bb5b63f8b653b254010}
    }
  • D. Petti, A. Stroppa, S. Picozzi, S. Brivio, M. Cantoni, and R. Bertacco, “Effect of Au proximity on the LSMO surface: An ab initio study,” , vol. 324, iss. 17, p. 2659–2663, 2012.
    [Bibtex]
    @Article{Petti2012,
    Title = {Effect of Au proximity on the LSMO surface: An ab initio study},
    Author = {Petti, D. and Stroppa, A. and Picozzi, S. and Brivio, S. and Cantoni, M. and Bertacco, R.},
    Year = {2012},
    Number = {17},
    Pages = {2659--2663},
    Volume = {324},
    __markedentry = {[User:6]},
    Abstract = {The effect of the proximity of Au on the electronic and magnetic properties of La 0.66Sr 0.33MnO 3 (LSMO) has been investigated by means of ab initio calculations within the density-functional theory. The calculations show an orbital reconstruction of the interfacial Mn, which is due more to the presence of a discontinuity rather than to a real chemical interaction with Au atoms. In fact, the same orbital reconstruction is found in the free LSMO surface. In both cases of Au/LSMO and LSMO surface, the Mn magnetic moments change very little with respect to the bulk case. In general, the calculations show a negligible influence of the Au atomic layer on LSMO at an ideal interface, with the LSMO surface magnetic and electronic properties essentially unchanged. © 2012 Elsevier B.V.},
    Address = {CNR-SPIN LAquila, Italy},
    Booktitle = {Journal of Magnetism and Magnetic Materials},
    Comment = {Export Date: 26 June 2015},
    Keywords = {DFT, Gold, Interface formation, LSMO, Magnetic property},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84860301159&partnerID=40&md5=e87d0c317e6f24ce320644e44a05d720}
    }
  • G. Radaelli, S. Brivio, I. Fina, and R. Bertacco, “Correlation between growth dynamics and dielectric properties of epitaxial BaTiO3 films,” , vol. 100, iss. 10, p. –, 2012.
    [Bibtex]
    @Article{Radaelli2012,
    Title = {Correlation between growth dynamics and dielectric properties of epitaxial BaTiO3 films},
    Author = {Radaelli, G. and Brivio, S. and Fina, I. and Bertacco, R.},
    Year = {2012},
    Number = {10},
    Pages = {--},
    Volume = {100},
    __markedentry = {[User:6]},
    Abstract = {We report on the effect of the substrate temperature on the growth dynamics and dielectric properties of BaTiO 3 epitaxial films on Nb:SrTiO 3 (001) substrates. By real-time reflection high energy electron diffraction analysis, we quantitatively estimated the adatoms surface diffusivity as a function of temperature. The increase of the substrate temperature promotes surface diffusion, which reflects in the improvement of BaTiO 3 ferroelectric properties up to 680 C. Above this temperature, Ba re-evaporation occurs, leading to a rapid deterioration of the dielectric and ferroelectric properties. This work shed light on thermally activated physical mechanisms which determine the ferroelectric properties of BaTiO 3 films. © 2012 American Institute of Physics.},
    Address = {Institut de Cincia de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain},
    Booktitle = {Applied Physics Letters},
    Comment = {Cited By :5
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84858415915&partnerID=40&md5=67eb5b7f87ec7d591ba0e5ecac4e1c06}
    }
  • C. Rinaldi, M. Cantoni, D. Petti, and R. Bertacco, “Epitaxial Fe/MgO/Ge spin-photodiodes for integrated detection of light helicity at room temperature,” , vol. 111, iss. 7, p. –, 2012.
    [Bibtex]
    @Article{Rinaldi2012,
    Title = {Epitaxial Fe/MgO/Ge spin-photodiodes for integrated detection of light helicity at room temperature},
    Author = {Rinaldi, C. and Cantoni, M. and Petti, D. and Bertacco, R.},
    Year = {2012},
    Number = {7},
    Pages = {--},
    Volume = {111},
    __markedentry = {[User:6]},
    Abstract = {We report on spin-photodiodes based on fully epitaxial Fe/MgO/Ge(001) heterostructures for the room temperature integrated detection of light helicity at a wavelength of 1300 nm. The degree of circular polarization of light is related to the spin direction of photo-excited carriers in Ge that are filtered by the MgO barrier, with probabilities differing for the two spin channels. Spin-detection experiments are performed by illuminating spin-photodiodes using left or right circularly polarized light under the application of a magnetic field parallel to the light direction and measuring the current crossing the device. We found that the maximum percentage variation of the photocurrent due to full reversal of the light helicity is on the order of 5.9 at room temperature. This variation can be attributed in part to the magnetic circular dichroism of Fe (0.8) but mainly to the spin filtering of photo-generated carriers across the MgO barrier. © 2012 American Institute of Physics.},
    Address = {CNISM, L NESS, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy},
    Booktitle = {Journal of Applied Physics},
    Comment = {Cited By :2
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84861723984&partnerID=40&md5=cc25a7b5751b2ae65b6fa34c82f6c773}
    }
  • C. Rinaldi, M. Cantoni, D. Petti, A. Sottocorno, M. Leone, N. M. Caffrey, S. Sanvito, and R. Bertacco, “Ge-based spin-photodiodes for room-temperature integrated detection of photon helicity,” , vol. 24, iss. 22, p. 3037–3041, 2012.
    [Bibtex]
    @Article{Rinaldi2012a,
    Title = {Ge-based spin-photodiodes for room-temperature integrated detection of photon helicity},
    Author = {Rinaldi, C. and Cantoni, M. and Petti, D. and Sottocorno, A. and Leone, M. and Caffrey, N.M. and Sanvito, S. and Bertacco, R.},
    Year = {2012},
    Number = {22},
    Pages = {3037--3041},
    Volume = {24},
    __markedentry = {[User:6]},
    Abstract = {Spin-photodiodes based on Fe/MgO/Ge(001) heterostructures are reported. These devices perform the room-temperature integrated electrical detection of the spin polarization of a photocurrent generated by circularly polarized photons with a wavelength of 1300 nm, for light pulses with intensity I 0 down to 200 μW. A forward and reverse-biased average photocurrent variation of 5.9% is measured for the complete reversal of the incident light helicity. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.},
    Address = {School of Physics, Center for Research on Adaptive Nanostructures and Nanodevices, Trinity College, Dublin 2, Ireland},
    Booktitle = {Advanced Materials},
    Comment = {Cited By :12
    Export Date: 26 June 2015},
    Keywords = {magnetism, photonics, spin-optoelectronics, spintronics},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84861803242&partnerID=40&md5=ae10ab995e7779b72650e31381db1946}
    }
  • C. Rinaldi, M. Espahbodi, M. Cantoni, and R. Bertacco, “Spin-photodiodes for SiGe spin-optoelectronics,” in Proceedings of SPIE – The International Society for Optical Engineering, L-NESS and CNISM, Dipartimento di Fisica, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy, 2012, p. –.
    [Bibtex]
    @InProceedings{Rinaldi2012b,
    Title = {Spin-photodiodes for SiGe spin-optoelectronics},
    Author = {Rinaldi, C. and Espahbodi, M. and Cantoni, M. and Bertacco, R.},
    Booktitle = {Proceedings of SPIE - The International Society for Optical Engineering},
    Year = {2012},
    Address = {L-NESS and CNISM, Dipartimento di Fisica, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy},
    Pages = {--},
    Volume = {8461},
    __markedentry = {[User:6]},
    Abstract = {We report on spin-photodiodes based on fully epitaxial Fe/MgO/Ge(001) heterostructures for room temperature integrated detection of light helicity at 1300 nm and 1550 nm wavelengths. The degree of circular polarization of light determines the spin direction of photo-carriers in Ge that are filtered by the Fe/MgO analyzer. Spin-detection experiments are performed by measuring the photocurrent while illuminating the spin-photodiodes with left or right circularly polarized light, under the application of a magnetic field parallel to the light direction which drives the Fe magnetization out of plane. We found that the spin-photodiodes spin filtering asymmetry is reduced by ∼40% in forward bias and by less than 15% in reverse bias, when increasing the photon wavelength from 1300 nm to 1550 nm. This result, apparently counterintuitive because of the larger spin polarization of the photo-carriers generated at 1550 nm with respect to that at 1300 nm, is explained in terms of the different spatial profile of carrier generation inside Ge. The larger penetration depth of light at 1550 nm leads to a smaller polarization of photocarriers when they reach the MgO tunneling barrier, due to the more efficient spin relaxation during transport. © 2012 SPIE.},
    Comment = {Export Date: 26 June 2015},
    Keywords = {Germanium, Polarimetry, Spin-Optoelectronics, Spin-photodiodes, Spintronics},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84872121252&partnerID=40&md5=56f0bcefc57044f530f0b611b01a6e11}
    }
  • P. Torelli, M. Sperl, R. Ciancio, J. Fujii, C. Rinaldi, M. Cantoni, R. Bertacco, M. Utz, D. Bougeard, M. Soda, E. Carlino, G. Rossi, C. H. Back, and G. Panaccione, “Growth of ultrathin epitaxial Fe/MgO spin injector on (0, 0, 1) (Ga, Mn)As,” , vol. 23, iss. 46, p. –, 2012.
    [Bibtex]
    @Article{Torelli2012,
    Title = {Growth of ultrathin epitaxial Fe/MgO spin injector on (0, 0, 1) (Ga, Mn)As},
    Author = {Torelli, P. and Sperl, M. and Ciancio, R. and Fujii, J. and Rinaldi, C. and Cantoni, M. and Bertacco, R. and Utz, M. and Bougeard, D. and Soda, M. and Carlino, E. and Rossi, G. and Back, C.H. and Panaccione, G.},
    Year = {2012},
    Number = {46},
    Pages = {--},
    Volume = {23},
    __markedentry = {[User:6]},
    Abstract = {We have grown an ultrathin epitaxial Fe/MgO bilayer on (Ga, Mn)As by e-beam evaporation in UHV. The system structure has been investigated by high resolution transmission electron microscopy (TEM) experiments which show that the Fe and MgO films, covering completely the (Ga, Mn)As, grow with the epitaxial relationship Fe[100](001)∥MgO[110](001)∥(Ga,Mn)As[110](001). The magnetic reversal process, studied by the magneto-optical Kerr effect (MOKE) at room temperature, demonstrates that the iron is ferromagnetic and possesses a cubic anisotropy, confirming the epitaxy relationship found with TEM. Resistivity measurements across the barrier display a non-Ohmic behavior characterized by cubic conductance as a function of the applied voltage suggesting tunneling-dominated transport across the barrier. © 2012 IOP Publishing Ltd.},
    Address = {Dipartimento di Fisica, Università di Modena e Reggio Emilia, via Campi 213/a, I-41100 Modena, Italy},
    Booktitle = {Nanotechnology},
    Comment = {Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84867952368&partnerID=40&md5=73fdef1ce283b73597d46cb440dcdbb2}
    }
  • A. Torti, V. Mondiali, A. Cattoni, M. Donolato, E. Albisetti, A. M. Haghiri-Gosnet, P. Vavassori, and R. Bertacco, “Single particle demultiplexer based on domain wall conduits,” , vol. 101, iss. 14, p. –, 2012.
    [Bibtex]
    @Article{Torti2012,
    Title = {Single particle demultiplexer based on domain wall conduits},
    Author = {Torti, A. and Mondiali, V. and Cattoni, A. and Donolato, M. and Albisetti, E. and Haghiri-Gosnet, A.M. and Vavassori, P. and Bertacco, R.},
    Year = {2012},
    Number = {14},
    Pages = {--},
    Volume = {101},
    __markedentry = {[User:6]},
    Abstract = {The remote manipulation of micro and nano-sized magnetic particles carrying molecules or biological entities over a chip surface is of paramount importance for future on-chip applications in biology and medicine. In this paper, we present a method for the on-chip demultiplexing of individual magnetic particles using bifurcated magnetic nano-conduits for the propagation of constrained domain walls (DWs). We demonstrate that the controlled injection and propagation of a domain wall in a bifurcation allow capturing, transporting, and sorting a single magnetic particle between two predefined paths. The cascade of n levels of such building blocks allows for the implementation of a variety of complex sorting devices as, e.g., a demultiplexer for the controlled sorting among 2 n paths. © 2012 American Institute of Physics.},
    Address = {IKERBASQUE, Basque Foundation for Science, Bilbao 48011, Spain},
    Booktitle = {Applied Physics Letters},
    Comment = {Cited By :10
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84867566833&partnerID=40&md5=7800efc219658e62f484b3ab4b54b1af}
    }

2011

  • S. Brivio, D. Petti, R. Bertacco, and J. C. Cezar, “Electric field control of magnetic anisotropies and magnetic coercivity in Fe/BaTiO3 (001) heterostructures,” , vol. 98, iss. 9, p. –, 2011.
    [Bibtex]
    @Article{Brivio2011,
    Title = {Electric field control of magnetic anisotropies and magnetic coercivity in Fe/BaTiO3 (001) heterostructures},
    Author = {Brivio, S. and Petti, D. and Bertacco, R. and Cezar, J.C.},
    Year = {2011},
    Number = {9},
    Pages = {--},
    Volume = {98},
    __markedentry = {[User:6]},
    Abstract = {Magnetoelectric effects in Fe/BaTiO3 (001) heterostructures have been investigated via magneto-optical Kerr effect as a function of temperature. We find major modifications of magnetic anisotropies and magnetic coercivity induced by the application of electric fields perpendicular to the interface. Changes in the coercive magnetic field, on the order of 100% at 250 K (in the orthorhombic phase of BaTiO3) and 40% at 300 K (in the tetragonal phase), which are linked to the ferroelectric behavior of BaTiO3, are reported. © 2011 American Institute of Physics.},
    Address = {European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France},
    Booktitle = {Applied Physics Letters},
    Comment = {Cited By :26
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-79952389818&partnerID=40&md5=9310671eb4e4cea516ad858505a1d8ae}
    }
  • S. Brivio, D. Polli, A. Crespi, R. Osellame, G. Cerullo, and R. Bertacco, “Observation of anomalous acoustic phonon dispersion in SrTiO3 by broadband stimulated Brillouin scattering,” , vol. 98, iss. 21, p. –, 2011.
    [Bibtex]
    @Article{Brivio2011a,
    Title = {Observation of anomalous acoustic phonon dispersion in SrTiO3 by broadband stimulated Brillouin scattering},
    Author = {Brivio, S. and Polli, D. and Crespi, A. and Osellame, R. and Cerullo, G. and Bertacco, R.},
    Year = {2011},
    Number = {21},
    Pages = {--},
    Volume = {98},
    __markedentry = {[User:6]},
    Abstract = {Femtosecond laser pulses have been used to generate and detect longitudinal acoustic phonons along the [001] direction of SrTiO3 single crystals coated with a thin absorbing layer. Two-dimensional maps of the reflectivity as a function of probe wavelength and time delay display persistent oscillations, from which the frequency-dependent group velocity of the photoinduced strain pulse can be directly measured. By applying the theory of stimulated Brillouin scattering we found that the longitudinal sound speed varies from 7900 to 7520 m/s in the 60-74 rad μ m-1 wave vector range, thus indicating a clear deviation from a linear phonon dispersion relationship. © 2011 American Institute of Physics.},
    Address = {Dipartimento di Fisica, Politecnico di Milano, IFN-CNR, Piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Applied Physics Letters},
    Comment = {Cited By :8
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-79959481543&partnerID=40&md5=fd811f3f9b5fb8787859185a66523d01}
    }
  • S. Brivio, C. Rinaldi, D. Petti, R. Bertacco, and F. Sanchez, “Epitaxial growth of Fe/BaTiO3 heterostructures,” , vol. 519, iss. 17, p. 5804–5807, 2011.
    [Bibtex]
    @Article{Brivio2011b,
    Title = {Epitaxial growth of Fe/BaTiO3 heterostructures},
    Author = {Brivio, S. and Rinaldi, C. and Petti, D. and Bertacco, R. and Sanchez, F.},
    Year = {2011},
    Number = {17},
    Pages = {5804--5807},
    Volume = {519},
    __markedentry = {[User:6]},
    Abstract = {The realization of epitaxial heterostructures involving ferroelectric (FE) and ferromagnetic (FM) materials is one of the possible routes towards the realization of devices exploiting sizable magnetoelectric effects. In this paper we demonstrate the epitaxial growth of Fe on BaTiO3(001) as this system represents a prototypical example of interface between well known FE and FM materials with bcc and perovskite structure respectively, both with Curie temperature well above 300 K. Fe grows on BaTiO3 with 45° rotation of its cubic lattice with respect to that of the substrate in order to reduce the lattice mismatch. Negligible interdiffusion of Ba and Ti cations or Fe atoms is found by X-ray photoemission spectroscopy, while a sizable Fe oxidation occurs within an interfacial layer with thicknesses thinner than 3 nm. © 2010 Elsevier B.V. All rights reserved.},
    Address = {Institut de Ciència de Materials de Barcelona, Consejo Superior de Investigaciones Cientìficas, Campus Universitat Autònoma de Barcelona, Bellaterra 08193, Catalunya, Spain},
    Booktitle = {Thin Solid Films},
    Comment = {Cited By :12
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-79958007936&partnerID=40&md5=4e49fccc32093387b60eb3ac7d83c79c}
    }
  • M. Cantoni, D. Petti, C. Rinaldi, and R. Bertacco, “Bandstructure line-up of epitaxial Fe/MgO/Ge heterostructures: A combined x-ray photoelectron spectroscopy and transport study,” , vol. 98, iss. 3, p. –, 2011.
    [Bibtex]
    @Article{Cantoni2011,
    Title = {Bandstructure line-up of epitaxial Fe/MgO/Ge heterostructures: A combined x-ray photoelectron spectroscopy and transport study},
    Author = {Cantoni, M. and Petti, D. and Rinaldi, C. and Bertacco, R.},
    Year = {2011},
    Number = {3},
    Pages = {--},
    Volume = {98},
    __markedentry = {[User:6]},
    Abstract = {The bandstructure line-up of Fe/MgO/Ge heterostructures with various Ge doping has been determined by x-ray photoemission spectroscopy. The MgO layer causes a sizable depinning of the Fermi level in Ge for light n- (10 15 cm-3) and moderate p -doping (1018 cm -3), but not for heavy n-doping (1020 cm-3). The Fermi level instead stays essentially in the middle of the MgO gap for all the investigated doping. This picture agrees with transport measurements only for moderate n- or p-doping, while we demonstrate that for heavy n-doping the analysis of the conductance versus temperature fails in predicting the Schottky barrier height. © 2011 American Institute of Physics.},
    Address = {Dipartimento di Fisica, L-NESS and CNISM, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy},
    Booktitle = {Applied Physics Letters},
    Comment = {Cited By :12
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-79251543363&partnerID=40&md5=37969c778367c61429d7e2412027f628}
    }
  • M. Cantoni, D. Petti, C. Rinaldi, and R. Bertacco, “Epitaxial growth of Fe/MgO/Ge(0 0 1) heterostructures,” , vol. 88, iss. 4, p. 530–533, 2011.
    [Bibtex]
    @Article{Cantoni2011a,
    Title = {Epitaxial growth of Fe/MgO/Ge(0 0 1) heterostructures},
    Author = {Cantoni, M. and Petti, D. and Rinaldi, C. and Bertacco, R.},
    Year = {2011},
    Number = {4},
    Pages = {530--533},
    Volume = {88},
    __markedentry = {[User:6]},
    Abstract = {We report on the growth of epitaxial Fe/MgO heterostructures on Ge(0 0 1) by Molecular Beam Epitaxy. The better crystal quality and interfacial chemical sharpness at the oxide-semiconductor interface have been obtained by growing MgO at room temperature, followed by a post-annealing at 773 K, on top of a p(2 -- 1)-Ge(0 0 1) clean surface. The growth of Fe at room temperature followed by annealing at 473 K gives the best epitaxial structure with optimized crystallinity of each layer compatible with limited chemical interdiffusion. Tunneling devices based on the epitaxial Fe/MgO/Ge heterostructure have been micro-fabricated and tested in order to probe the electrical properties of the MgO barrier. The current-voltage characteristics clearly show that tunneling is the dominant phenomenon, thus indicating that this system is very promising for practical applications in electronics and spintronics. © 2010 Elsevier B.V. All rights reserved.},
    Address = {L-NESS, Dipartimento di Fisica, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy},
    Booktitle = {Microelectronic Engineering},
    Comment = {Cited By :6
    Export Date: 26 June 2015},
    Keywords = {Epitaxy, Germanium, Magnesium oxide, MOS heterostructure},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-79751531247&partnerID=40&md5=a78661f43e9f5092b808fdc176b005c8}
    }
  • M. Donolato, E. Sogne, B. T. Dalslet, M. Cantoni, D. Petti, J. Cao, F. Cardoso, S. Cardoso, P. P. Freitas, M. F. Hansen, and R. Bertacco, “On-chip measurement of the Brownian relaxation frequency of magnetic beads using magnetic tunneling junctions,” , vol. 98, iss. 7, p. –, 2011.
    [Bibtex]
    @Article{Donolato2011,
    Title = {On-chip measurement of the Brownian relaxation frequency of magnetic beads using magnetic tunneling junctions},
    Author = {Donolato, M. and Sogne, E. and Dalslet, B.T. and Cantoni, M. and Petti, D. and Cao, J. and Cardoso, F. and Cardoso, S. and Freitas, P.P. and Hansen, M.F. and Bertacco, R.},
    Year = {2011},
    Number = {7},
    Pages = {--},
    Volume = {98},
    __markedentry = {[User:6]},
    Abstract = {We demonstrate the detection of the Brownian relaxation frequency of 250 nm diameter magnetic beads using a lab-on-chip platform based on current lines for exciting the beads with alternating magnetic fields and highly sensitive magnetic tunnel junction (MTJ) sensors with a superparamagnetic free layer. The first harmonic out-of-phase component of the MTJ response gives the imaginary part of the magnetic bead susceptibility, which peaks at the Brownian relaxation frequency. This work paves the way to on-chip implementation of Brownian magnetorelaxometry in innovative "lab-on-a-bead" assays for biomolecular recognition. © 2011 American Institute of Physics.},
    Address = {INESC Microsistemas e Nanotecnologias (INESC MN), Rua Alves Redol 9, 1000-029 Lisbon, Portugal},
    Booktitle = {Applied Physics Letters},
    Comment = {Cited By :11
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-79951911200&partnerID=40&md5=99c3fd784df51e76c2f353ff8282ae3c}
    }
  • M. Donolato, A. Torti, N. Kostesha, M. Deryabina, E. Sogne, P. Vavassori, M. F. Hansen, and R. Bertacco, “Magnetic domain wall conduits for single cell applications,” , vol. 11, iss. 17, p. 2976–2983, 2011.
    [Bibtex]
    @Article{Donolato2011a,
    Title = {Magnetic domain wall conduits for single cell applications},
    Author = {Donolato, M. and Torti, A. and Kostesha, N. and Deryabina, M. and Sogne, E. and Vavassori, P. and Hansen, M.F. and Bertacco, R.},
    Year = {2011},
    Number = {17},
    Pages = {2976--2983},
    Volume = {11},
    __markedentry = {[User:6]},
    Abstract = {The ability to trap, manipulate and release single cells on a surface is important both for fundamental studies of cellular processes and for the development of novel lab-on-chip miniaturized tools for biological and medical applications. In this paper we demonstrate how magnetic domain walls generated in micro- and nano-structures fabricated on a chip surface can be used to handle single yeast cells labeled with magnetic beads. In detail, first we show that the proposed approach maintains the microorganism viable, as proven by monitoring the division of labeled yeast cells trapped by domain walls over 16 hours. Moreover, we demonstrate the controlled transport and release of individual yeast cells via displacement and annihilation of individual domain walls in micro- and nano-sized magnetic structures. These results pave the way to the implementation of magnetic devices based on domain walls technology in lab-on-chip systems devoted to accurate individual cell trapping and manipulation. © 2011 The Royal Society of Chemistry.},
    Address = {IKERBASQUE, Basque Foundation for Science, E-48011, Bilbao, Spain},
    Booktitle = {Lab on a Chip - Miniaturisation for Chemistry and Biology},
    Comment = {Cited By :22
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-80051659293&partnerID=40&md5=c7cf8e3026d48decdfea5d07c6929eac}
    }
  • M. Donolato, A. Torti, E. Sogne, N. Kostesha, M. Deryabina, P. Vavassori, M. F. Hansen, and R. Bertacco, “On-chip single cell manipulation via magnetic domain wall conduits,” in 15th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2011, MicroTAS 2011, CIC nanoGUNE Consolider, San-Sebastian, Spain, 2011, p. 139–141.
    [Bibtex]
    @InProceedings{Donolato2011b,
    Title = {On-chip single cell manipulation via magnetic domain wall conduits},
    Author = {Donolato, M. and Torti, A. and Sogne, E. and Kostesha, N. and Deryabina, M. and Vavassori, P. and Hansen, M.F. and Bertacco, R.},
    Booktitle = {15th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2011, MicroTAS 2011},
    Year = {2011},
    Address = {CIC nanoGUNE Consolider, San-Sebastian, Spain},
    Pages = {139--141},
    Volume = {1},
    __markedentry = {[User:6]},
    Abstract = {In this paper we demonstrate how magnetic domain walls generated in micro-and nano-structures fabricated on a chip surface can be used to handle single yeast cells labeled with magnetic beads in a microfluidic cell by means of weak external magnetic fields. In particular here we show trapping at well defined positions on the chip surface, release, transport over large distances and precise manipulation, with 200 nm resolution, of individual viable Saccharomyces cerevisiae yeast cells. These results pave the way to the implementation of magnetic devices based on domain walls technology in lab-on-chip system devoted to accurate individual cell trapping and manipulation. Copyright © (2011) by the Chemical and Biological Microsystems Society.},
    Comment = {Export Date: 26 June 2015},
    Keywords = {Lab-on-chip, Magnetic beads, Magnetic domain wall, Microfluidics, Yeast cells},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84883747781&partnerID=40&md5=2ae14f3ea40b293cacfe59555130e406}
    }
  • R. Ferragut, A. Dupaquier, S. Brivio, R. Bertacco, and W. Egger, “Study of defects in an electroresistive Au/La2/3Sr 1/3MnO3/SrTiO3(001) heterostructure by positron annihilation,” , vol. 110, iss. 5, p. –, 2011.
    [Bibtex]
    @Article{Ferragut2011,
    Title = {Study of defects in an electroresistive Au/La2/3Sr 1/3MnO3/SrTiO3(001) heterostructure by positron annihilation},
    Author = {Ferragut, R. and Dupaquier, A. and Brivio, S. and Bertacco, R. and Egger, W.},
    Year = {2011},
    Number = {5},
    Pages = {--},
    Volume = {110},
    __markedentry = {[User:6]},
    Abstract = {Defects in an ultrathin Au/La2/3Sr1/3MnO 3/SrTiO3 (Au/LSMO/STO) heterostructure displaying electroresistive behavior were studied using variable energy positron annihilation spectroscopy. Vacancy-like defects were found to be the dominant positron traps in the LSMO and STO thin perovskite oxides with a number density >1017 cm-3 and 2 -- 1017 cm -3 in the STO substrate. High defect density was revealed by strong positron trapping at the Au/LSMO interface. Oxygen deficiency in LSMO would be the main source of these traps. Besides, a low density of sub-nano voids of ∼6Å was found in the substrate and in the thin LSMO/STO films. © 2011 American Institute of Physics.},
    Address = {Institut für Angewandte Physik und Messtechnik, Universität der Bundeswehr München, Werner Heisenberg-Weg 39, D-85577, Neubiberg, Germany},
    Booktitle = {Journal of Applied Physics},
    Comment = {Cited By :3
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-80052952697&partnerID=40&md5=19146c5dd46644a1b2964c4fed4c48db}
    }
  • J. Gazquez, M. Varela, D. Petti, M. Cantoni, C. Rinaldi, S. Brivio, and R. Bertacco, “Aberration corrected scanning transmission electron microscopy and electron energy loss spectroscopy studies of epitaxial Fe/MgO/(001)Ge heterostructures,” , vol. 46, iss. 12, p. 4157–4161, 2011.
    [Bibtex]
    @Article{Gazquez2011,
    Title = {Aberration corrected scanning transmission electron microscopy and electron energy loss spectroscopy studies of epitaxial Fe/MgO/(001)Ge heterostructures},
    Author = {Gazquez, J. and Varela, M. and Petti, D. and Cantoni, M. and Rinaldi, C. and Brivio, S. and Bertacco, R.},
    Year = {2011},
    Number = {12},
    Pages = {4157--4161},
    Volume = {46},
    __markedentry = {[User:6]},
    Abstract = {Aberration correction in the scanning transmission electron microscope combined with electron energy loss spectroscopy allows simultaneous mapping of the structure, the chemistry and even the electronic properties of materials in one single experiment with spatial resolutions of the order of one Ångström. Here the authors will apply these techniques to the characterization of epitaxial Fe/MgO/(001)Ge and interfaces with possible applications for tunneling junctions, and the authors will show that epitaxial MgO films can be grown on a (001)Ge substrates by molecular beam epitaxy and how it is possible to map the chemistry of interfaces with atomic resolution. © 2011 Springer Science+Business Media, LLC (outside the USA).},
    Address = {Dipartimento di Fisica-Politecnico di Milano, L-NESS, Via Anzani 42, Como 22100, Italy},
    Booktitle = {Journal of Materials Science},
    Comment = {Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-79953796485&partnerID=40&md5=7bc62ad63d073f83b9549767e59b3e8b}
    }
  • L. Pattini, R. Bertacco, G. Candiani, M. Masseroli, and S. Servi, “Trends in biomedical engineering: Focus on genomics and proteomics,” , vol. 9, iss. 2, p. 98–108, 2011.
    [Bibtex]
    @Article{Pattini2011,
    Title = {Trends in biomedical engineering: Focus on genomics and proteomics},
    Author = {Pattini, L. and Bertacco, R. and Candiani, G. and Masseroli, M. and Servi, S.},
    Year = {2011},
    Number = {2},
    Pages = {98--108},
    Volume = {9},
    __markedentry = {[User:6]},
    Abstract = {Genomics is the study of an organism's genome aimed at the functional specification of the different parts of the sequence that comprise the blueprint of the living cell to unveil the mechanisms of the physiology of the cell and its basic, developmental, and tissue-specific processes. Proteomics is the comprehensive study of the executive molecules of the cell coded by the genome, further raising the level of complexity, because of the large amplification in the number, going from genes to proteins, and to the sophisticated structural and functional characterization of protein products, which confer specific biochemical properties. While continuous progress in technology provides new experimental solutions to study and measure the behavior of genes and proteins in the cell, the analysis and the management of biological data cannot be uncoupled from the use of mathematics, statistics, and informatics disciplines that play a key role in modern molecular biology. Together, genomics and proteomics, meant as complementary approaches, delineate the framework of modern molecular medicine, where the knowledge of the functional mechanisms on a subcellular scale, both under physiologic and pathologic conditions, may lead to an improvement in diagnosis, therapy, and drug development.},
    Address = {Department of Chemistry, Materials and Chemical Engineering G. Natta, Politecnico di Milano, Milano, Italy},
    Booktitle = {Journal of Applied Biomaterials and Biomechanics},
    Comment = {Cited By :3
    Export Date: 26 June 2015},
    Keywords = {Biocatalysis, Bioinformatics, Biosensors, Genomics, Proteomics, Spintronic},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-79960980040&partnerID=40&md5=75143c622a3d2f86b04d423ea7248123}
    }
  • D. Petti, M. Cantoni, C. Rinaldi, and R. Bertacco, “Chemical and electronic properties of Fe/MgO/Ge heterostructures for spin electronics,” , vol. 292, iss. 1, p. –, 2011.
    [Bibtex]
    @Article{Petti2011a,
    Title = {Chemical and electronic properties of Fe/MgO/Ge heterostructures for spin electronics},
    Author = {Petti, D. and Cantoni, M. and Rinaldi, C. and Bertacco, R.},
    Year = {2011},
    Number = {1},
    Pages = {--},
    Volume = {292},
    __markedentry = {[User:6]},
    Abstract = {We report on the chemical and electronic properties of epitaxial Fe/MgO/Ge(001) heterostructures probed by X-ray Photoemission Spectroscopy. At variance with the Fe/MgO/Fe system, annealing at 570 K produces a sizable interdiffusion at the upper Fe/MgO interface, while at 470 K this process is inhibited. The XPS analysis of band alignment in heterostructures annealed at 470 K grown onto an intrinsic Ge substrate indicates that the Fermi level is placed at the center of the MgO gap and that the Schottky barrier height is 0.35±0.1 eV, thus indicating a partial depinning of the Fermi level.},
    Address = {LNESS, Dipartimento di Fisica - Politecnico di Milano, Via Anzani 42, 22100 Como, Italy},
    Booktitle = {Journal of Physics: Conference Series},
    Comment = {Cited By :1
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-79956125212&partnerID=40&md5=f978350411a801ada411362732b158bc}
    }
  • D. Petti, M. Cantoni, C. Rinaldi, S. Brivio, R. Bertacco, J. Gazquez, and M. Varela, “Sharp Fe/MgO/Ge(001) epitaxial heterostructures for tunneling junctions,” , vol. 109, iss. 8, p. –, 2011.
    [Bibtex]
    @Article{Petti2011,
    Title = {Sharp Fe/MgO/Ge(001) epitaxial heterostructures for tunneling junctions},
    Author = {Petti, D. and Cantoni, M. and Rinaldi, C. and Brivio, S. and Bertacco, R. and Gazquez, J. and Varela, M.},
    Year = {2011},
    Number = {8},
    Pages = {--},
    Volume = {109},
    __markedentry = {[User:6]},
    Abstract = {We report on the growth of epitaxial Fe/MgO/Ge(001) heterostructures by molecular beam epitaxy. The lowest oxidation and highest sharpness of the MgO/Ge interface, corresponding to a transition layer on the order of one Ge unit cell, is obtained for room temperature growth of the MgO layer followed by annealing in a vacuum at 500 °C. In these conditions, the MgO layer grows epitaxially on Ge(001) with the [110] direction parallel to the [100] direction of Ge, at variance with the cube-on-cube growth on Si(001) and GaAs(001). However, in some cases, the cube-on-cube growth mode of MgO on Ge competes with the mode involving a 45° rotation, as revealed by transmission electron microscopy and photoelectron diffraction data on MgO films grown at 300 °C without postannealing, and on p-doped Ge substrates. For the Fe overlayer, in all the cases reported, room temperature growth followed by annealing up to 200 °C gives rise to a sharp interface and the well-known 45° rotation of the Fe lattice with respect to the MgO lattice. © 2011 American Institute of Physics.},
    Address = {Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States},
    Booktitle = {Journal of Applied Physics},
    Comment = {Cited By :5
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-79955740006&partnerID=40&md5=bff66a9832ec59e906dde979bf417c48}
    }

2010

  • C. Borioli, S. Franz, P. L. Cavallotti, M. Cantoni, and R. Bertacco, “Influence of magnetic fields on autocatalytic deposition of Co-Fe thin films,” , vol. 157, iss. 8, p. D437–D442, 2010.
    [Bibtex]
    @Article{Borioli2010,
    Title = {Influence of magnetic fields on autocatalytic deposition of Co-Fe thin films},
    Author = {Borioli, C. and Franz, S. and Cavallotti, P.L. and Cantoni, M. and Bertacco, R.},
    Year = {2010},
    Number = {8},
    Pages = {D437--D442},
    Volume = {157},
    __markedentry = {[User:6]},
    Abstract = {In the present paper, the effect of magnetic fields (17-98 mT) on the autocatalytic deposition of Co1-x-Fex (35-42 atom %) thin films is addressed. The deposition kinetics was strongly related to field intensity. Low magnetic fields (17 mT) increased the deposition rate by a factor of 2, whereas high magnetic fields (above 76 mT) completely inhibited the deposition process after a few minutes from the beginning of the reaction. Alloy composition was also affected by the application of magnetic fields. Depending on the intensity of the applied field, the Fe content in the alloy gradually changed from 36 to 41 atom % below 200 nm and from 42 to 37 atom % above 200 nm of thickness. On average, the application of magnetic fields during the deposition process increased the coercivity of thin Co-Fe films and made them anisotropic, with the extent of such an effect depending on film thickness. © 2010 The Electrochemical Society.},
    Address = {Laboratorio per Nanostrutture Epitassiali Su Silicio e per Spintronica, Dipartimento di Fisica, Politecnico di Milano, 22100 Como, Italy},
    Booktitle = {Journal of the Electrochemical Society},
    Comment = {Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-77954732469&partnerID=40&md5=3e890a7ed8df22e9fdb26183fd127e8c}
    }
  • S. Brivio, M. Cantoni, D. Petti, and R. Bertacco, “Near-room-temperature control of magnetization in field effect devices based on La0.67 Sr0.33 MnO3 thin films,” , vol. 108, iss. 11, p. –, 2010.
    [Bibtex]
    @Article{Brivio2010a,
    Title = {Near-room-temperature control of magnetization in field effect devices based on La0.67 Sr0.33 MnO3 thin films},
    Author = {Brivio, S. and Cantoni, M. and Petti, D. and Bertacco, R.},
    Year = {2010},
    Number = {11},
    Pages = {--},
    Volume = {108},
    __markedentry = {[User:6]},
    Abstract = {The control of the magnetization in ferromagnetic layers via electric fields is a hot topic in view of applications to the next generation of spintronic devices, where writing the magnetic information through current lines could be replaced by electric writing. Mixed valence manganites are good candidates for such a purpose because they present an intriguing coupling between ferromagnetism and charge ordering/doping which can be tuned by the application of an electric field. Here we present results on the near-room temperature control of the magnetization of optimally doped La0.67 Sr0.33 MnO3 ultrathin films in vertical field effect devices, where they act as top or bottom electrodes. In the latter case a slight decrease in the Curie temperature (∼5 K) is observed after application of 5-- 107 V/m, i.e., the maximum field preventing electric breakdown, compatible with the induced variation in the charge density and mixed valence within the Thomas Fermi screening length. These results indicate that electric fields achievable in vertical field effect devices, of the same entity of interfacial fields originating from differences in the work function in heterostructures, have only minor influence on the magnetic properties of optimally doped ultrathin La0.67 Sr0.33 MnO3 films. © 2010 American Institute of Physics.},
    Address = {Dipartimento di Fisica, CNISM, Politecnico di Milano, via Anzani 42, 22100 Como, Italy},
    Booktitle = {Journal of Applied Physics},
    Comment = {Cited By :11
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-78751485589&partnerID=40&md5=d3355fb6344e278d563965715e3d74b8}
    }
  • S. Brivio, C. Magen, A. A. Sidorenko, D. Petti, M. Cantoni, M. Finazzi, F. Ciccacci, R. De Renzi, M. Varela, S. Picozzi, and R. Bertacco, “Effects of Au nanoparticles on the magnetic and transport properties of La0.67 Sr0.33 MnO3 ultrathin layers,” , vol. 81, iss. 9, p. –, 2010.
    [Bibtex]
    @Article{Brivio2010,
    Title = {Effects of Au nanoparticles on the magnetic and transport properties of La0.67 Sr0.33 MnO3 ultrathin layers},
    Author = {Brivio, S. and Magen, C. and Sidorenko, A.A. and Petti, D. and Cantoni, M. and Finazzi, M. and Ciccacci, F. and De Renzi, R. and Varela, M. and Picozzi, S. and Bertacco, R.},
    Year = {2010},
    Number = {9},
    Pages = {--},
    Volume = {81},
    __markedentry = {[User:6]},
    Abstract = {The effect of the proximity of Au nanoparticles on the transport and magnetic properties of ultrathin La2/3 Sr1/3 MnO3 (LSMO) films has been investigated. We find a huge increase in the resistivity of the manganite (by four orders of magnitude for a Au nominal thickness of 2 nm), which is accompanied by a strong decrease in the Curie temperature. A combined scanning transmission electron microscopy and electron energy-loss spectroscopy analysis shows that interfaces are coherent and atomically sharp, and that the structural quality is very high. On the other hand, a strong reduction in the Mn oxidation state is seen upon Au capping. NMR data show a strong attenuation of the double exchange signal upon formation of Au nanoparticles. Ab initio calculations indicate a negligible influence of Au on LSMO at an ideal interface, with the LSMO surface magnetic and electronic properties essentially unchanged upon creation of the Au/LSMO interface. In view of these calculations, the experimental results cannot be explained in terms of purely electrostatic effects induced by the proximity of a noble metal. Here we propose that the main driving force underlying the observed change in physical properties is the high reactivity of Au nanoparticles, which can locally pump oxygen from the manganite, thus favoring a phase separation ensuing from O inhomogeneity which deteriorates the transport and electrical properties. © 2010 The American Physical Society.},
    Address = {Instituto de Nanociencia de Aragón-ARAID, Departamento de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :15
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-77954921555&partnerID=40&md5=11aa9fbc6368862b10e3a061fa1ec511}
    }
  • M. Cantoni, D. Petti, R. Bertacco, I. Pallecchi, D. Marŕ, G. Colizzi, A. Filippetti, and V. Fiorentini, “Band alignment at Cu2O/La0.7Sr0.3MnO 3 interface: A combined experimental-theoretical determination,” , vol. 97, iss. 3, p. –, 2010.
    [Bibtex]
    @Article{Cantoni2010,
    Title = {Band alignment at Cu2O/La0.7Sr0.3MnO 3 interface: A combined experimental-theoretical determination},
    Author = {Cantoni, M. and Petti, D. and Bertacco, R. and Pallecchi, I. and Marŕ, D. and Colizzi, G. and Filippetti, A. and Fiorentini, V.},
    Year = {2010},
    Number = {3},
    Pages = {--},
    Volume = {97},
    __markedentry = {[User:6]},
    Abstract = {Cu2O/La0.7Sr0.3MnO3 is a promising heterostructure for the realization of all-oxide spintronics devices, with La0.7Sr0.3MnO3 (LSMO) and Cu2 O playing the roles of ferromagnet and semiconductor, respectively. Here we use x-ray photoelectron spectroscopy and first principles calculations to determine the valence band offset at the Cu2O/LSMO interface. The interface band alignment is typical of a p-type semiconductor/metal contact, with an interface barrier of 0.3-0.5 eV depending on Cu2 O thickness. The calculated energetics indicates that the prevailing interface is between SrO-terminated LSMO and Cu planes of Cu2O. © 2010 American Institute of Physics.},
    Address = {CNR-IOM SLACS, Dipartimento di Fisica, Universit̀ di Cagliari, S.P. Monserrato-Sestu Km. 0.700, Monserrato, 09042 Cagliari, Italy},
    Booktitle = {Applied Physics Letters},
    Comment = {Cited By :5
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-77956196867&partnerID=40&md5=f2719a316dadb7d1c53f14ba743be64b}
    }
  • M. Donolato, M. Gobbi, P. Vavassori, M. Cantoni, V. Metlushko, B. Ilic, M. Zhang, S. X. Wang, M. F. Hansen, and R. Bertacco, “Detection of a single synthetic antiferromagnetic nanoparticle with an AMR nanostructure: Comparison between simulations and experiments,” , vol. 200, iss. SECTION 12, p. –, 2010.
    [Bibtex]
    @Article{Donolato2010a,
    Title = {Detection of a single synthetic antiferromagnetic nanoparticle with an AMR nanostructure: Comparison between simulations and experiments},
    Author = {Donolato, M. and Gobbi, M. and Vavassori, P. and Cantoni, M. and Metlushko, V. and Ilic, B. and Zhang, M. and Wang, S.X. and Hansen, M.F. and Bertacco, R.},
    Year = {2010},
    Number = {SECTION 12},
    Pages = {--},
    Volume = {200},
    __markedentry = {[User:6]},
    Abstract = {The depinning field of a domain wall in a permalloy nanostructure can be used to detect the presence of a magnetic particle. In this device the displacement of the domain wall in a sweeping magnetic field produces a variation of the voltage drop across a corner due to the anisotropic magnetoresistance effect and hence an electrical signal. In this paper we use micromagnetic simulations to calculate the output signal of a particularly shaped device in the presence of a single synthetic antiferromagnetic nanoparticle. The calculated magnetoresistive signal is in good agreement with corresponding experimental data © 2010 IOP Publishing Ltd.},
    Address = {CNR-INFM National Research Center S3, Dipartimento di Fisica, Università di Ferrara, I-44100 Ferrara, Italy},
    Booktitle = {Journal of Physics: Conference Series},
    Comment = {Cited By :3
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-77957066579&partnerID=40&md5=46682d146b66c65712e7a4003dd1568f}
    }
  • M. Donolato, P. Vavassori, M. Gobbi, M. Deryabina, M. F. Hansen, V. Metlushko, B. Ilic, M. Cantoni, D. Petti, S. Brivio, and R. Bertacco, “On-chip manipulation of protein-coated magnetic beads via domain-wall conduits,” , vol. 22, iss. 24, p. 2706–2710, 2010.
    [Bibtex]
    @Article{Donolato2010,
    Title = {On-chip manipulation of protein-coated magnetic beads via domain-wall conduits},
    Author = {Donolato, M. and Vavassori, P. and Gobbi, M. and Deryabina, M. and Hansen, M.F. and Metlushko, V. and Ilic, B. and Cantoni, M. and Petti, D. and Brivio, S. and Bertacco, R.},
    Year = {2010},
    Number = {24},
    Pages = {2706--2710},
    Volume = {22},
    __markedentry = {[User:6]},
    Abstract = {Geometrically constrained magnetic domain walls (DWs) in magnetic nanowires can be manipulated at the nanometer scale. The inhomogeneous magnetic stray field generated by a DW can capture a magnetic nanoparticle in solution. On-chip nanomanipulation of individual magnetic beads coated with proteins is demonstrated through the motion of geometrically constrained DWs in specially designed magnetic nanoconduits fully integrated in a lab-on-a-chip platform. Figure Presented © 2010 WILEY-VCH Verlag GmbH & Co. KCaA, Weinheim.},
    Address = {Department of Electrical and Computer Engineering, University of Illinois at Chicago, Chicago IL, 60607, United States},
    Booktitle = {Advanced Materials},
    Comment = {Cited By :51
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-77954839741&partnerID=40&md5=1dcfb29f64ef4fe42ad3d55b2c02b3b5}
    }
  • W. Noun, E. Popova, F. Bardelli, Y. Dumont, R. Bertacco, A. Tagliaferri, M. Tessier, M. Guyot, B. Berini, and N. Keller, “Determination of yttrium iron garnet superexchange parameters as a function of oxygen and cation stoichiometry,” , vol. 81, iss. 5, p. –, 2010.
    [Bibtex]
    @Article{Noun2010,
    Title = {Determination of yttrium iron garnet superexchange parameters as a function of oxygen and cation stoichiometry},
    Author = {Noun, W. and Popova, E. and Bardelli, F. and Dumont, Y. and Bertacco, R. and Tagliaferri, A. and Tessier, M. and Guyot, M. and Berini, B. and Keller, N.},
    Year = {2010},
    Number = {5},
    Pages = {--},
    Volume = {81},
    __markedentry = {[User:6]},
    Abstract = {In this work, we describe the consequences of oxygen and metal-ion deficiency for the magnetic properties of a magnetic oxide in bulk and thin-film form. The influence of the off stoichiometry on valence of the iron atoms and the local structural configuration of these atoms is investigated in correlation with the magnetic Curie temperatures and the associated microscopic parameters, such as the exchange integrals. Combining both structural information obtained by x-ray absorption spectroscopy at FeK edge and exchange integrals as determined from temperature-resolved magneto-optical magnetometry, we show that the electron-transfer integrals, underlying the superexchange interaction, control the global dependence of the Curie temperature on stoichiometry as should be expected. The determination of the electron-transfer integrals allows also the confirmation that metal-ion deficiencies in off-stoichiometric yttrium iron garnet (OS YIG) films lead to a significant increase in the magnetization (as observed experimentally). That can only be explained when considering a preferential site occupation of the iron vacancies on octahedral sites in agreement with our earlier work on OS YIG films. Furthermore, the combination of the experimentally determined iron valence with the Fea -O-Fed bonding angle and the exchange integrals allows for the direct determination of the crystal electric field parameter and the Coulomb repulsion energy as a function of the stoichiometry of the YIG films. © 2010 The American Physical Society.},
    Address = {NIS, C/o Dipartimento di Chimica IFM, Via P. Giuria 7, 10125 Torino, Italy},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :3
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-77954812879&partnerID=40&md5=2f3509523e7aea7e1b90bc520e353c74}
    }
  • D. Petti, M. Cantoni, M. Leone, R. Bertacco, and E. Rizzi, “Activation of Zr-Co-rare earth getter films: An XPS study,” , vol. 256, iss. 21, p. 6291–6296, 2010.
    [Bibtex]
    @Article{Petti2010,
    Title = {Activation of Zr-Co-rare earth getter films: An XPS study},
    Author = {Petti, D. and Cantoni, M. and Leone, M. and Bertacco, R. and Rizzi, E.},
    Year = {2010},
    Number = {21},
    Pages = {6291--6296},
    Volume = {256},
    __markedentry = {[User:6]},
    Abstract = {Thin films of non-evaporable getters are employed in the field of electronic devices packaging, as they provide a simple and effective solution for pumping in sealed applications. In particular thin films of Zr-Co-rare earth alloys deposited by sputtering have been developed for this purpose and successfully employed in industrial applications. In this paper we present an X-ray photoelectron spectroscopy investigation of the effect of thermal activation of the getter from the point of view of the induced surface chemical modification as seen by such a surface sensitive technique. We find that the activation process reflects in a clear reduction of Zr, accompanied by a decrease of the oxygen concentration at surface, which is fully accomplished already at 350 °C; while at 450 °C there is a significant increase of the cobalt concentration at surface. © 2010 Elsevier B.V. All rights reserved.},
    Address = {SAES Getters S.p.A., R and D Corporate Laboratories, viale Italia 77, 20020 Lainate (MI), Italy},
    Booktitle = {Applied Surface Science},
    Comment = {Cited By :15
    Export Date: 26 June 2015},
    Keywords = {Activation, Carbides, Non-evaporable getter, Oxidation, X-ray photoelectron spectroscopy, Zirconium},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-77953132933&partnerID=40&md5=7f5a8addf5e4079b92c97425a3f3b5b0}
    }
  • P. Vavassori, M. Gobbi, M. Donolato, M. Cantoni, R. Bertacco, V. Metlushko, and B. Ilic, “Magnetic nanostructures for the manipulation of individual nanoscale particles in liquid environments (invited),” , vol. 107, iss. 9, p. –, 2010.
    [Bibtex]
    @Article{Vavassori2010,
    Title = {Magnetic nanostructures for the manipulation of individual nanoscale particles in liquid environments (invited)},
    Author = {Vavassori, P. and Gobbi, M. and Donolato, M. and Cantoni, M. and Bertacco, R. and Metlushko, V. and Ilic, B.},
    Year = {2010},
    Number = {9},
    Pages = {--},
    Volume = {107},
    __markedentry = {[User:6]},
    Abstract = {The manipulation of geometrically constrained magnetic domain walls (DWs) in nanoscale magnetic strips attracted much interest recently, with proposals for prospective memory and logic devices. Here we demonstrate that the high controllability of the motion of geometrically constrained DWs allows for the manipulation of individual nanoparticles in solution on a chip with the active control of position at the nanometer scale. Our approach exploits the fact that magnetic nanoparticles in suspension can be captured by a DW, whose position can be manipulated with nanometer scale accuracy in specifically designed magnetic nanowire structures. We hereby show that the precise control over DW nucleation, displacement, and annihilation processes in such nanostructures allows for the capture, transport, and release of magnetic nanoparticles. As magnetic nanoparticles with functionalized surfaces are widely used as molecule carriers or labels for single molecule studies, cell manipulation, and biomagnetic sensing, the accurate control over the handling of the single magnetic nanoparticle in suspension is a crucial building block for several applications in biotechnology, nanochemistry, and nanomedicine. © 2010 American Institute of Physics.},
    Address = {Cornell Nanofabrication Facility, Cornell University, Ithaca, NY 14853, United States},
    Booktitle = {Journal of Applied Physics},
    Comment = {Cited By :6
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-77951682901&partnerID=40&md5=5054159e36c3628a35acd06093e5d87a}
    }

2009

  • R. Bertacco, M. Donolato, M. Gobbi, M. Cantoni, D. Petti, S. Brivio, V. Metlushko, B. Ilic, and P. Vavassori, “On-chip manipulation of single magnetic nano-particles via domain walls conduits,” in 2009 9th IEEE Conference on Nanotechnology, IEEE NANO 2009, CNR-INFM S3, Dipartimento di Fisica, Università di Ferrara, 44100 Ferrara, Italy, 2009, p. 485–486.
    [Bibtex]
    @InProceedings{Bertacco2009,
    Title = {On-chip manipulation of single magnetic nano-particles via domain walls conduits},
    Author = {Bertacco, R. and Donolato, M. and Gobbi, M. and Cantoni, M. and Petti, D. and Brivio, S. and Metlushko, V. and Ilic, B. and Vavassori, P.},
    Booktitle = {2009 9th IEEE Conference on Nanotechnology, IEEE NANO 2009},
    Year = {2009},
    Address = {CNR-INFM S3, Dipartimento di Fisica, Università di Ferrara, 44100 Ferrara, Italy},
    Pages = {485--486},
    __markedentry = {[User:6]},
    Abstract = {We demonstrate on-chip manipulation of individual nanoparticles in suspension with active control of position at the nanometer scale, through the control of the motion of geometrically constrained domain walls (DWs) in magnetic nano-conduits. Magnetic nanoparticles are captured by the stray field of a DW and their transport and release is obtained via precise control over DW nucleation, displacement, and annihilation processes. In comparison with other manipulation techniques, our approach is unique because it combines the true single nano-particle manipulation ability at the nanoscale and the compatibility with lab-on-chip applications. As magnetic nano-particles are widely used for tagging molecules or cells, our method holds great potential for biological applications involving manipulation, transport and sorting of molecules and cells on surfaces. This work opens the way towards the realization of microchip-based platforms for high-throughput cell manipulation or single molecule analysis and synthesis. © 2009 IEEE NANO Organizers.},
    Comment = {Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-77951020878&partnerID=40&md5=b85eb464460e2515285fa890ff92e7a9}
    }
  • M. Cantoni, R. Bertacco, A. Brambilla, and F. Ciccacci, “Photon- and electron-induced surface voltage in electron spectroscopies on ZnSe(0 0 1),” , vol. 173, iss. 2-3, p. 84–87, 2009.
    [Bibtex]
    @Article{Cantoni2009,
    Title = {Photon- and electron-induced surface voltage in electron spectroscopies on ZnSe(0 0 1)},
    Author = {Cantoni, M. and Bertacco, R. and Brambilla, A. and Ciccacci, F.},
    Year = {2009},
    Number = {2-3},
    Pages = {84--87},
    Volume = {173},
    __markedentry = {[User:6]},
    Abstract = {The surface band bending in ZnSe(0 0 1), as a function of the temperature, is investigated both in the valence band (by photoemission) and in the conduction band (by inverse photoemission and absorbed current spectroscopies). Two different mechanisms are invoked for interpreting the experimental data: the band bending due to surface states, and the surface voltage induced by the incident beam. While the latter is well known in photoemission (surface photovoltage), we demonstrate the existence of a similar effect in inverse photoemission and absorbed current spectroscopies, induced by the incident electrons instead of photons. These results point to the importance of considering the surface voltage effect even in electron-in techniques for a correct evaluation of the band bending. © 2009 Elsevier B.V. All rights reserved.},
    Address = {L-NESS, Dipartimento di Fisica - Politecnico di Milano, Via Anzani 42, 22100 Como, Italy},
    Booktitle = {Journal of Electron Spectroscopy and Related Phenomena},
    Comment = {Cited By :2
    Export Date: 26 June 2015},
    Keywords = {Absorbed current, Inverse photoemission, Photoemission, Surface band bending, Surface photovoltage, ZnSe},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-67651161869&partnerID=40&md5=8284a331e76825fb6cc6782109e33cdb}
    }
  • A. Cattoni, D. Petti, S. Brivio, M. Cantoni, R. Bertacco, and F. Ciccacci, “MgO/Fe(001) and MgO/Fe (001) -p (1–1) O interfaces for magnetic tunnel junctions: A comparative study,” , vol. 80, iss. 10, p. –, 2009.
    [Bibtex]
    @Article{Cattoni2009,
    Title = {MgO/Fe(001) and MgO/Fe (001) -p (1--1) O interfaces for magnetic tunnel junctions: A comparative study},
    Author = {Cattoni, A. and Petti, D. and Brivio, S. and Cantoni, M. and Bertacco, R. and Ciccacci, F.},
    Year = {2009},
    Number = {10},
    Pages = {--},
    Volume = {80},
    __markedentry = {[User:6]},
    Abstract = {The chemical, structural, and electronic properties of MgO/Fe(001) and MgO/Fe (001) -p (1--1) O interfaces for magnetic tunnel junctions (MTJs) have been widely investigated by means of electron spectroscopy. In particular, we present a detailed analysis of the spin-resolved electronic structure above the Fermi level, carried out by spin-polarized inverse photoemission and absorbed current spectroscopy. The MgO barrier presents good crystallinity and sharp interfaces when grown both onto Fe(001) and Fe (001) -p (1--1) O. Moreover, we find that the exchange splitting of unoccupied bands is essentially the same for the two MgO/Fe interfaces, even though it is different for the two starting surfaces, being larger in Fe (001) -p (1--1) O than in Fe(001). Our findings indicate that Fe (001) -p (1--1) O is a good candidate for the realization of heterostructures for magnetic tunnel junctions because of its high chemical stability and reproducibility, as compared to clean Fe(001). © 2009 The American Physical Society.},
    Address = {L-NESS, Dipartimento di Fisica, Politecnico di Milano, via Anzani 42, 22100 Como, Italy},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :12
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-70349925713&partnerID=40&md5=17a3987ce1fcb5f70f7705902aaa5549}
    }
  • M. Donolato, M. Gobbi, P. Vavassori, M. Leone, M. Cantoni, V. Metlushko, B. Ilic, M. Zhang, S. X. Wang, and R. Bertacco, “Nanosized corners for trapping and detecting magnetic nanoparticles,” , vol. 20, iss. 38, p. –, 2009.
    [Bibtex]
    @Article{Donolato2009a,
    Title = {Nanosized corners for trapping and detecting magnetic nanoparticles},
    Author = {Donolato, M. and Gobbi, M. and Vavassori, P. and Leone, M. and Cantoni, M. and Metlushko, V. and Ilic, B. and Zhang, M. and Wang, S.X. and Bertacco, R.},
    Year = {2009},
    Number = {38},
    Pages = {--},
    Volume = {20},
    __markedentry = {[User:6]},
    Abstract = {We present a device concept based on controlled micromagnetic configurations in a corner-shaped permalloy nanostructure terminated with two circular disks, specifically designed for the capture and detection of a small number of magnetic beads in suspension. A transverse head-to-head domain wall (TDW) placed at the corner of the structure plays the role of an attracting pole for magnetic beads. The TDW is annihilated in the terminating disks by applying an appropriate magnetic field, whose value is affected by the presence of beads chemically bound to the surface. In the case where the beads are not chemically bound to the surface, the annihilation of the TDW causes their release into the suspension. The variation of the voltage drop across the corner, due to the anisotropic magnetoresistance (AMR) while sweeping the magnetic field, is used to detect the presence of a chemically bound bead. The device response has been characterized by using both synthetic antiferromagnetic nanoparticles (disks of 70nm diameter and 20nm height) and magnetic nanobeads, for different thicknesses of the protective capping layer. We demonstrate the detection down to a single nanoparticle, therefore the device holds the potential for the localization and detection of small numbers of molecules immobilized on the particle's functionalized surface. © 2009 IOP Publishing Ltd.},
    Address = {Department of Electrical Engineering, Stanford University, Stanford, CA 94305, United States},
    Booktitle = {Nanotechnology},
    Comment = {Cited By :30
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-70349128199&partnerID=40&md5=8cc518c495ea0a32303d967c160d5381}
    }
  • M. Donolato, P. Vavassori, M. Gobbi, V. Metlushko, B. Ilic, S. Brivio, D. Petti, and R. Bertacco, “On-chip nano-manipulation of single magnetic particles via domain walls conduits for cell or molecule handling,” in Proceedings of Conference, MicroTAS 2009 – The 13th International Conference on Miniaturized Systems for Chemistry and Life Sciences, CNRINFM S3, CNISM, Universitá di Ferrara, 44100 Ferrara, Italy, 2009, p. 860–862.
    [Bibtex]
    @InProceedings{Donolato2009,
    Title = {On-chip nano-manipulation of single magnetic particles via domain walls conduits for cell or molecule handling},
    Author = {Donolato, M. and Vavassori, P. and Gobbi, M. and Metlushko, V. and Ilic, B. and Brivio, S. and Petti, D. and Bertacco, R.},
    Booktitle = {Proceedings of Conference, MicroTAS 2009 - The 13th International Conference on Miniaturized Systems for Chemistry and Life Sciences},
    Year = {2009},
    Address = {CNRINFM S3, CNISM, Universitá di Ferrara, 44100 Ferrara, Italy},
    Pages = {860--862},
    __markedentry = {[User:6]},
    Abstract = {We present a method for the manipulation (capture, transport, accumulation, and release) of nanometric magnetic beads in wet environments with active control of position (at the nm scale) and time, utilizing patterned magnetic structures as domain wall conduits. We show that with a patterned square conduit of permalloy it is possible to trap and transport a single magnetic nanobead between the two corners of the nanostructure. This concept, implemented in more complex conduits, can allow to sort and manipulate different targets (cells or molecules linked to a magnetic particle) in parallel on the chip surface. © 2009 CBMS.},
    Comment = {Export Date: 26 June 2015},
    Keywords = {Domain wall, Magnetic bead, Magnetic nanostructure, Magnetic tweezers},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84901807508&partnerID=40&md5=555c4c143ab8727e0c5953f759341e63}
    }
  • X. Marti, V. Skumryev, A. Cattoni, R. Bertacco, V. Laukhin, C. Ferrater, M. V. García-Cuenca, M. Varela, F. Sánchez, and J. Fontcuberta, “Ferromagnetism in epitaxial orthorhombic YMnO3 thin films,” , vol. 321, iss. 11, p. 1719–1722, 2009.
    [Bibtex]
    @Article{Marti2009,
    Title = {Ferromagnetism in epitaxial orthorhombic YMnO3 thin films},
    Author = {Marti, X. and Skumryev, V. and Cattoni, A. and Bertacco, R. and Laukhin, V. and Ferrater, C. and García-Cuenca, M.V. and Varela, M. and Sánchez, F. and Fontcuberta, J.},
    Year = {2009},
    Number = {11},
    Pages = {1719--1722},
    Volume = {321},
    __markedentry = {[User:6]},
    Abstract = {Epitaxial orthorhombic YMnO3 thin films, (0 0 1) oriented, have been grown by pulsed laser deposition on (0 0 1)SrTiO3 substrates. Their crystal structure and magnetic response have been studied in detail. Although bulk o-YMnO3 is antiferromagnetic, our magnetic measurements reveal intriguing thermal hysteresis between the zero-field-cooled and field-cooled curves below the onset of the antiferromagnetic ordering temperature, thus signaling a more complex magnetic structure with net ferromagnetic moments. We discuss on the possible origin of this net magnetization and we have found a correlation of the magnetic response with the strain state of the films. We propose that substrate-induced strain modifies the subtle competition of magnetic interactions and leads to a non-collinear magnetic state that can thus be tuned by strain engineering. © 2009 Elsevier B.V. All rights reserved.},
    Address = {Departament de Física Aplicada i Òptica, Universitat de Barcelona, Diagonal 647, Barcelona, 08028, Spain},
    Booktitle = {Journal of Magnetism and Magnetic Materials},
    Comment = {Cited By :21
    Export Date: 26 June 2015},
    Keywords = {Induced ferromagnetism, Multiferroic films, Strain effects, YMnO3},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-64149123009&partnerID=40&md5=859f2c6079589fe96a3226db852398b2}
    }
  • P. Vavassori, M. Gobbi, M. Donolato, V. Metlushko, B. Ilic, M. Cantoni, D. Petti, S. Brivio, and R. Bertacco, “Manipulation at the nano-scale of single magnetic particles via domain walls conduits,” in Proceedings of the 2009 International Conference on Electromagnetics in Advanced Applications, ICEAA ’09, Cornell Nanofabrication Facility, Cornell University, Ithaca, NY 14853, United States, 2009, p. 837–840.
    [Bibtex]
    @InProceedings{Vavassori2009,
    Title = {Manipulation at the nano-scale of single magnetic particles via domain walls conduits},
    Author = {Vavassori, P. and Gobbi, M. and Donolato, M. and Metlushko, V. and Ilic, B. and Cantoni, M. and Petti, D. and Brivio, S. and Bertacco, R.},
    Booktitle = {Proceedings of the 2009 International Conference on Electromagnetics in Advanced Applications, ICEAA '09},
    Year = {2009},
    Address = {Cornell Nanofabrication Facility, Cornell University, Ithaca, NY 14853, United States},
    Pages = {837--840},
    __markedentry = {[User:6]},
    Abstract = {We demonstrate on-chip manipulation of individual nanoparticles in suspension with active control of position at the nanometer scale, through the control of the motion of geometrically constrained domain walls (DWs) in magnetic nano-conduits. Magnetic nanoparticles are captured by the stray field of a DW and their transport and release is obtained via precise control over DW nucleation, displacement, and annihilation processes. In comparison with other manipulation techniques, our approach is unique because it combines the true single nano-particle manipulation ability at the nanoscale and the compatibility with lab-on-chip applications. As magnetic nano-particles are widely used for tagging molecules or cells, our method holds great potential for biological applications involving manipulation, transport and sorting of molecules and cells on surfaces. This work opens the way towards the realization of microchip-based platforms for high-throughput cell manipulation or single molecule analysis and synthesis. © 2009 IEEE.},
    Comment = {Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-72849125802&partnerID=40&md5=589f4952c2a87883f23654cc6df859d6}
    }

2008

  • R. Bertacco, A. Tagliaferri, M. Riva, L. Signorini, M. Cantoni, A. Cattoni, F. Ciccacci, B. A. Davidson, F. Maccherozzi, I. Vobornik, and G. Panaccione, “Surface electronic and magnetic properties of La2/3 Sr1/3 MnO3 thin films with extended metallicity above the Curie temperature,” , vol. 78, iss. 3, p. –, 2008.
    [Bibtex]
    @Article{Bertacco2008,
    Title = {Surface electronic and magnetic properties of La2/3 Sr1/3 MnO3 thin films with extended metallicity above the Curie temperature},
    Author = {Bertacco, R. and Tagliaferri, A. and Riva, M. and Signorini, L. and Cantoni, M. and Cattoni, A. and Ciccacci, F. and Davidson, B.A. and Maccherozzi, F. and Vobornik, I. and Panaccione, G.},
    Year = {2008},
    Number = {3},
    Pages = {--},
    Volume = {78},
    __markedentry = {[User:6]},
    Abstract = {The surface electronic and magnetic properties of epitaxial La2/3 Sr1/3 MnO3 / SrTiO3 (001) films with extended bulk metallicity above the Curie temperature have been investigated. By angle-resolved photoemission we show that the surface electronic structure presents the eg dispersing band, responsible for the half-metallicity, crossing the Fermi level and leading to a sharp Fermi edge. Quasiparticle excitations, reflecting the coherent polaronic ferromagnetic and metallic ground state, are clearly visible at the Fermi level and 16 K, while they disappear at room temperature, where a Fermi edge is still clearly visible. X-ray magnetic circular dichroism shows a robust subsurface magnetization up to TC, while spin-polarization Mott spectroscopy indicates a rapid suppression of the surface magnetization which disappears around room temperature. These results clearly demonstrate that a robust surface metallic electronic structure does not necessarily ensure the concomitant stabilization of long-range magnetic order. © 2008 The American Physical Society.},
    Address = {CNR-INFM TASC National Laboratory, AREA Science Park, S.S. 14 Km 163.5, Basovizza, 34012 Trieste, Italy},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :8
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-49149101703&partnerID=40&md5=a10e057fca9ea21a2d3a88a6ade94d42}
    }
  • A. Cattoni, R. Bertacco, M. Cantoni, F. Ciccacci, H. Von Kaenel, and G. J. Norga, “Impact of O2 exposure on surface crystallinity of clean and Ba terminated Ge(1 0 0) surfaces,” , vol. 254, iss. 9, p. 2720–2724, 2008.
    [Bibtex]
    @Article{Cattoni2008,
    Title = {Impact of O2 exposure on surface crystallinity of clean and Ba terminated Ge(1 0 0) surfaces},
    Author = {Cattoni, A. and Bertacco, R. and Cantoni, M. and Ciccacci, F. and Von Kaenel, H. and Norga, G.J.},
    Year = {2008},
    Number = {9},
    Pages = {2720--2724},
    Volume = {254},
    __markedentry = {[User:6]},
    Abstract = {In analogy with the case of Sr on Si [Y. Liang, S. Gan, M. Engelhard, Appl. Phys. Lett. 79 (2001) 3591], we studied surface crystallinity and oxidation behaviour of clean and Ba terminated Ge(1 0 0) surfaces as a function of oxygen pressure and temperature. The structural and chemical changes in the Ge surface layer were monitored by LEED, XPS and real-time RHEED. In contrast to the oxidation retarding effect, observed for 1/2 monolayer of Sr on Si, the presence of a Ba termination layer leads to a pronounced increase in Ge oxidation rate with respect to clean Ge. In fact, while the Ge(1 0 0) surface terminated with 1/2 ML Ba amorphizes for a pO2 of 10-2 Torr, LEED indicates that clean Ge forms a thin (4.5 Å), 1 -- 1 ordered oxide upon aggressive O2 exposure (150 Torr, 200 °C, 30 min). We briefly discuss the origins for the difference in behaviour between Ba on Ge and Sr on Si. © 2007 Elsevier B.V. All rights reserved.},
    Address = {L-NESS, Department of Physics, Politecnico di Milano, Via Anzani 42, I-22100 Como, Italy},
    Booktitle = {Applied Surface Science},
    Comment = {Cited By :1
    Export Date: 26 June 2015},
    Keywords = {Ba, Ge, Oxide epitaxy, RHEED, Surface passivation, Surface termination, XPS},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-38949146405&partnerID=40&md5=3d45fa36ab5f7dcbb6b6e61a81373e1c}
    }
  • C. Magen, M. Varela, S. J. Pennycook, S. Brivio, D. Petti, M. Cantoni, and R. Bertacco, “Influence of Au electrodes on the properties of SrTiO3/La 0.67Sr0.33MnO3/Au magnetic tunnel junctions studied by aberration-corrected STEM-EELS,” , vol. 14, iss. SUPPL. 2, p. 1392–1393, 2008.
    [Bibtex]
    @Article{Magen2008,
    Title = {Influence of Au electrodes on the properties of SrTiO3/La 0.67Sr0.33MnO3/Au magnetic tunnel junctions studied by aberration-corrected STEM-EELS},
    Author = {Magen, C. and Varela, M. and Pennycook, S.J. and Brivio, S. and Petti, D. and Cantoni, M. and Bertacco, R.},
    Year = {2008},
    Number = {SUPPL. 2},
    Pages = {1392--1393},
    Volume = {14},
    __markedentry = {[User:6]},
    Address = {LNESS-CNISM-Dipartimento di Fisica, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy},
    Booktitle = {Microscopy and Microanalysis},
    Comment = {Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-49549114648&partnerID=40&md5=f2844d964f1213f726d86d6ebb4de84c}
    }
  • D. Petti, R. Bertacco, S. Brivio, M. Cantoni, A. Cattoni, and F. Ciccacci, “X-ray photoemission study of the Au La0.67 Sr0.33 Mn O3 interface formation,” , vol. 103, iss. 4, p. –, 2008.
    [Bibtex]
    @Article{Petti2008,
    Title = {X-ray photoemission study of the Au La0.67 Sr0.33 Mn O3 interface formation},
    Author = {Petti, D. and Bertacco, R. and Brivio, S. and Cantoni, M. and Cattoni, A. and Ciccacci, F.},
    Year = {2008},
    Number = {4},
    Pages = {--},
    Volume = {103},
    __markedentry = {[User:6]},
    Abstract = {We report an x-ray photoemission spectroscopy study of the Au La0.67 Sr0.33 Mn O3 interface formation, aiming to investigate interface abruptness and possible chemical interdiffusion. Our results indicate that the gold deposition does not affect the chemical properties of manganite film and no interdiffusion or segregation takes place. © 2008 American Institute of Physics.},
    Address = {LNESS-CNISM-Dipartimento di Fisica, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy},
    Booktitle = {Journal of Applied Physics},
    Comment = {Cited By :3
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-40149089090&partnerID=40&md5=98f829ec005736afd15057199e2dc150}
    }
  • P. Vavassori, V. Metlushko, B. Ilic, M. Gobbi, M. Donolato, M. Cantoni, and R. Bertacco, “Domain wall displacement in Py square ring for single nanometric magnetic bead detection,” , vol. 93, iss. 20, p. –, 2008.
    [Bibtex]
    @Article{Vavassori2008,
    Title = {Domain wall displacement in Py square ring for single nanometric magnetic bead detection},
    Author = {Vavassori, P. and Metlushko, V. and Ilic, B. and Gobbi, M. and Donolato, M. and Cantoni, M. and Bertacco, R.},
    Year = {2008},
    Number = {20},
    Pages = {--},
    Volume = {93},
    __markedentry = {[User:6]},
    Abstract = {An approach based on domain wall displacement in confined ferromagnetic nanostructures for attracting and sensing a single nanometric magnetic particle is presented. We modeled and experimentally demonstrated the viability of the approach using an anisotropic magnetoresistance device made by a micron-sized square ring of Permalloy. This detection concept can be suitable to biomolecular recognition and, in particular, to single molecule detection. © 2008 American Institute of Physics.},
    Address = {LNESS, Dipartimento di Fisica, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy},
    Booktitle = {Applied Physics Letters},
    Comment = {Cited By :46
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-56849134322&partnerID=40&md5=5f441c94f12ce317d1967b5fb89b9560}
    }

2007

  • R. Bertacco, S. Brivio, M. Cantoni, A. Cattoni, D. Petti, M. Finazzi, F. Ciccacci, A. A. Sidorenko, M. Ghidini, G. Allodi, and R. De Renzi, “Proximity effects induced by a gold layer on La0.67 Sr0.33 Mn O3 thin films,” , vol. 91, iss. 10, p. –, 2007.
    [Bibtex]
    @Article{Bertacco2007,
    Title = {Proximity effects induced by a gold layer on La0.67 Sr0.33 Mn O3 thin films},
    Author = {Bertacco, R. and Brivio, S. and Cantoni, M. and Cattoni, A. and Petti, D. and Finazzi, M. and Ciccacci, F. and Sidorenko, A.A. and Ghidini, M. and Allodi, G. and De Renzi, R.},
    Year = {2007},
    Number = {10},
    Pages = {--},
    Volume = {91},
    __markedentry = {[User:6]},
    Abstract = {The authors report about La0.67 Sr0.33 Mn O3 single crystal manganite thin films in interaction with a gold capping layer. With respect to uncoated manganite layers of the same thickness, Au-capped 4 nm thick manganite films reveal a dramatic reduction (≃185 K) of the Curie temperature TC and a lower saturation low temperature magnetization M0. A sizable TC reduction (≃60 K) is observed even when an inert SrTi O3 layer is inserted between the gold film and the 4 nm thick manganite layer, suggesting that this effect might have an electrostatic origin. © 2007 American Institute of Physics.},
    Address = {Dipartimento di Fisica, Universit̀ di Parma, Viale delle Scienze, 43100 Parma, Italy},
    Booktitle = {Applied Physics Letters},
    Comment = {Cited By :13
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-34548488656&partnerID=40&md5=af37f6dfe8e576d26f291cc43165c4d0}
    }
  • M. Bowen, J. -L. Maurice, A. Barthelemy, M. Bibes, D. Imhoff, V. Bellini, R. Bertacco, D. Wortmann, P. Seneor, E. Jacquet, A. Vaurès, J. Humbert, J. -P. Contour, C. Colliex, S. Blügel, and P. H. Dederichs, “Using half-metallic manganite interfaces to reveal insights into spintronics,” , vol. 19, iss. 31, p. –, 2007.
    [Bibtex]
    @Article{Bowen2007,
    Title = {Using half-metallic manganite interfaces to reveal insights into spintronics},
    Author = {Bowen, M. and Maurice, J.-L. and Barthelemy, A. and Bibes, M. and Imhoff, D. and Bellini, V. and Bertacco, R. and Wortmann, D. and Seneor, P. and Jacquet, E. and Vaurès, A. and Humbert, J. and Contour, J.-P. and Colliex, C. and Blügel, S. and Dederichs, P.H.},
    Year = {2007},
    Number = {31},
    Pages = {--},
    Volume = {19},
    __markedentry = {[User:6]},
    Abstract = {A half-metal has been defined as a material with propagating electron states at the Fermi energy only for one of the two possible spin projections, and as such has been promoted as an interesting research direction for spin electronics. This review details recent advances on manganite thin film research within the field of spintronics, before presenting the structural, electronic and spin-polarized solid-state tunnelling transport studies that we have performed on heterostructures involving La2/3Sr1/3MnO 3 thin films separated by SrTiO3 barriers. These experiments demonstrate that, with a polarization of spin electrons at the Fermi level that can reach 99%, the La2/3Sr1/3MnO 3/SrTiO3 interface for all practical purposes exhibits half-metallic behaviour. We offer insight into the electronic structure of the interface, including the electronic symmetry of any remaining spin states at the Fermi level. Finally, we present experiments that use the experimental half-metallic property of manganites as tools to reveal novel features of spintronics. © IOP Publishing Ltd.},
    Address = {Institut d'Electronique Fondamentale, Bâtiment 220, Université de Paris-Sud XI, 91405 Orsay, France},
    Booktitle = {Journal of Physics Condensed Matter},
    Comment = {Cited By :30
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-34247889694&partnerID=40&md5=43b58d78289b65d54ed003684b9dd0fb}
    }
  • S. Brivio, M. Cantoni, D. Petti, A. Cattoni, R. Bertacco, M. Finazzi, F. Ciccacci, A. Sidorenko, G. Allodi, M. Ghidini, and R. de Renzi, “Decrease of the Curie temperature in La0.67Sr0.33MnO3 thin films induced by Au capping,” , vol. 144, iss. 1-3, p. 93–96, 2007.
    [Bibtex]
    @Article{Brivio2007,
    Title = {Decrease of the Curie temperature in La0.67Sr0.33MnO3 thin films induced by Au capping},
    Author = {Brivio, S. and Cantoni, M. and Petti, D. and Cattoni, A. and Bertacco, R. and Finazzi, M. and Ciccacci, F. and Sidorenko, A. and Allodi, G. and Ghidini, M. and de Renzi, R.},
    Year = {2007},
    Number = {1-3},
    Pages = {93--96},
    Volume = {144},
    __markedentry = {[User:6]},
    Abstract = {Ferromagnetism of La0.67Sr0.33MnO3 is extremely sensitive to external perturbations like substrate-induced strain, charge injection and chemical interactions with neighbour layers. In this paper we discuss the perturbation induced by the presence of a metallic overlayer, typically deposited for electric contacts, in the prototypical case of the Au/La0.67Sr0.33MnO3 interface. In particular we found a sizable decrease of the Curie temperature in thin films of La0.67Sr0.33MnO3 after gold capping: 65 K for 5 nm thickness of the manganite. Apart from chemical reactions at the interface, charge injection-depletion induced by the difference in the work function between Au and La0.67Sr0.33MnO3 could partially explain this phenomenon. © 2007 Elsevier B.V. All rights reserved.},
    Address = {Dipartimento di Fisica Università di Parma, Parco Area delle Scienze 7/A, 43100 Parma, Italy},
    Booktitle = {Materials Science and Engineering B: Solid-State Materials for Advanced Technology},
    Comment = {Cited By :5
    Export Date: 26 June 2015},
    Keywords = {Curie temperature, Gold, Manganites, PLD},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-35748966668&partnerID=40&md5=39e809cc9d0369adf284e18644db596f}
    }
  • M. Cantoni, R. Bertacco, F. Ciccacci, E. Puppin, E. Pinotti, M. Brenna, M. Marangolo, M. Eddrieff, P. Torelli, F. Maccherozzi, J. Fujii, and G. Panaccione, “Temperature-dependent magnetism of Fe thin films on ZnSe(0 0 1),” , vol. 316, iss. 2 SPEC. ISS., p. e545–e548, 2007.
    [Bibtex]
    @Article{Cantoni2007,
    Title = {Temperature-dependent magnetism of Fe thin films on ZnSe(0 0 1)},
    Author = {Cantoni, M. and Bertacco, R. and Ciccacci, F. and Puppin, E. and Pinotti, E. and Brenna, M. and Marangolo, M. and Eddrieff, M. and Torelli, P. and Maccherozzi, F. and Fujii, J. and Panaccione, G.},
    Year = {2007},
    Number = {2 SPEC. ISS.},
    Pages = {e545--e548},
    Volume = {316},
    __markedentry = {[User:6]},
    Abstract = {We present X-ray magnetic circular dichroism (XMCD) and magneto-optical Kerr effect (MOKE) data on the magnetic properties of Fe/ZnSe(0 0 1) thin films at increasing Fe coverage. The magnetic behaviour of the Fe overlayer is superparamagnetic for a coverage up to 6 monolayers whereas, above this threshold, a truly ferromagnetic phase shows up. XMCD and MOKE data show that this behaviour is substantially unchanged in the temperature range 10-300 K for all the investigated coverages: these findings imply that the blocking temperature is definitely below 10 K. © 2007 Elsevier B.V. All rights reserved.},
    Address = {TASC Laboratory INFM-CNR in Area Science Park, S. S. 14, Km. 163.5, I-34012 Trieste, Italy},
    Booktitle = {Journal of Magnetism and Magnetic Materials},
    Comment = {Cited By :2
    Export Date: 26 June 2015},
    Keywords = {Blocking temperature, Coercivity, Superparamagnetism, Thin film, ZnSe},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-34250685832&partnerID=40&md5=3bc752e3052fe6fffa4b4ea73e058041}
    }
  • S. Picozzi, C. Ma, Z. Yang, R. Bertacco, M. Cantoni, A. Cattoni, D. Petti, S. Brivio, and F. Ciccacci, “Oxygen vacancies and induced changes in the electronic and magnetic structures of La0.66 Sr0.33 Mn O3: A combined ab initio and photoemission study,” , vol. 75, iss. 9, p. –, 2007.
    [Bibtex]
    @Article{Picozzi2007,
    Title = {Oxygen vacancies and induced changes in the electronic and magnetic structures of La0.66 Sr0.33 Mn O3: A combined ab initio and photoemission study},
    Author = {Picozzi, S. and Ma, C. and Yang, Z. and Bertacco, R. and Cantoni, M. and Cattoni, A. and Petti, D. and Brivio, S. and Ciccacci, F.},
    Year = {2007},
    Number = {9},
    Pages = {--},
    Volume = {75},
    __markedentry = {[User:6]},
    Abstract = {The effect of oxygen vacancies on the electronic and magnetic properties of La0.66 Sr0.33 Mn O3 (LSMO) has been investigated by means of ab initio calculations within the density-functional formalism combined with photoemission. The simulations show that the introduction of oxygen vacancies causes a shift of the valence-band features toward higher binding energies and an increase of the degree of covalency of Mn bondings. The Mn magnetic moments undergo some changes, keeping, however, the situation relatively close to the ideal nondefective system: in none of the different vacancy configurations, a drastic charge or spin rearrangement occurs. There is, though, an important vacancy-induced drawback: half-metallicity, typical of the perfectly stoichiometric system, is generally lost due to defective bands that cross the Fermi level. Photoemission experiments performed on epitaxial thin films of LSMO with different contents of oxygen vacancies grown by pulsed laser deposition essentially confirm theoretical predictions. Our findings clearly indicate that the control over oxygen deficiency should therefore be experimentally achieved to avoid unwanted consequences in terms of spin-injection efficiency. © 2007 The American Physical Society.},
    Address = {L-NESS, Dipartimento di Fisica del Politecnico di Milano, via Anzani 42, 22100 Como, Italy},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :35
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33947221363&partnerID=40&md5=4994e8394d42e31accac4bbac2a0b07e}
    }

2006

  • M. Cantoni, M. Riva, R. Bertacco, and F. Ciccacci, “Uniaxial magnetic anisotropies in Fe films on single crystal and virtual Ge(001) substrates studied with spin polarized inverse photoemission and MOKE,” , vol. 74, iss. 13, p. –, 2006.
    [Bibtex]
    @Article{Cantoni2006a,
    Title = {Uniaxial magnetic anisotropies in Fe films on single crystal and virtual Ge(001) substrates studied with spin polarized inverse photoemission and MOKE},
    Author = {Cantoni, M. and Riva, M. and Bertacco, R. and Ciccacci, F.},
    Year = {2006},
    Number = {13},
    Pages = {--},
    Volume = {74},
    __markedentry = {[User:6]},
    Abstract = {Fe films have been grown at room temperature on standard Ge(001) single crystals and virtual Ge Si1-x Gex Si (001) substrates, and their magnetic properties extensively investigated in situ by spin polarized inverse photoemission and magneto-optical Kerr effect. Two different uniaxial anisotropies have been found to coexist. The first one, giving rise to a [110] easy axis, is associated to the Fe Ge interface: it disappears at large thickness (more than 10 Fe layers), while dominates in very thin films (5 Fe layers) on virtual substrates. A second anisotropy, considerably smaller in strength, originates a [010] or [100] easy axis: it persists at large thickness (up to 60 Fe layers) and is essentially associated to bulk properties. However, this is not an intrinsic property, being related to the sample preparation conditions, i.e., substrate sputtering at oblique incidence for cleaning and Fe deposition at oblique incidence. The uniaxial easy axis is always perpendicular to the incidence plane, either of the Fe atoms flux or the ion beam, with a larger effect of deposition conditions with respect to sputtering. Our results give evidence of a strong correlation between morphology and magnetism in Fe Ge Si1-x Gex Si (001) and Fe Ge (001) films, opening the way to the engineering of magnetic properties via the control of the preparation conditions. © 2006 The American Physical Society.},
    Address = {L-NESS, Dipartimento di Fisica del Politecnico di Milano, Via Anzani 42, 22100 Como, Italy},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :7
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33750204013&partnerID=40&md5=ffcc21ad90e6c06a1010ae97dcb73298}
    }
  • M. Cantoni, M. Riva, G. Isella, R. Bertacco, and F. Ciccacci, “Ultrathin Fe films on single crystal and virtual Ge(0 0 1) substrates: Towards the control of magnetic properties,” , vol. 252, iss. 15, p. 5304–5307, 2006.
    [Bibtex]
    @Article{Cantoni2006,
    Title = {Ultrathin Fe films on single crystal and virtual Ge(0 0 1) substrates: Towards the control of magnetic properties},
    Author = {Cantoni, M. and Riva, M. and Isella, G. and Bertacco, R. and Ciccacci, F.},
    Year = {2006},
    Number = {15},
    Pages = {5304--5307},
    Volume = {252},
    __markedentry = {[User:6]},
    Abstract = {Ultrathin Fe films have been epitaxially grown at room temperature on standard single crystal Ge(0 0 1) substrates and virtual Ge/Si(0 0 1) substrates. Their magnetic and electronic properties have been investigated in situ by spin polarized inverse photoemission and magneto-optical Kerr effect. In both cases, the onset of ferromagnetism appears definitively at 3 ML, and the overall behavior is very similar in the case of standard and virtual substrates, so that the latter can be employed for growing high quality Fe/Ge/Si interfaces. All the films investigated display uniaxial anisotropy, which is explained in terms of the surface morphology induced by the preparation conditions. © 2005 Elsevier B.V. All rights reserved.},
    Address = {L-NESS, Dipartimento di Fisica dal Politecico di Milano, via Anzani 52, 22100 Como, Italy},
    Booktitle = {Applied Surface Science},
    Comment = {Cited By :2
    Export Date: 26 June 2015},
    Keywords = {Magnetic anisotropy, Nanostructures, Spin polarized inverse photoemission, Spintronics, Virtual substrate},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33744508411&partnerID=40&md5=e2f4e9f47bedb82db294fbd0d87e12b8}
    }
  • A. Cattoni, R. Bertacco, M. Riva, M. Cantoni, F. Ciccacci, H. Von Kanel, and G. J. Norga, “Effect of Ba termination layer on chemical and electrical passivation of Ge (1 0 0) surfaces,” , vol. 9, iss. 4-5 SPEC. ISS., p. 701–705, 2006.
    [Bibtex]
    @Article{Cattoni2006,
    Title = {Effect of Ba termination layer on chemical and electrical passivation of Ge (1 0 0) surfaces},
    Author = {Cattoni, A. and Bertacco, R. and Riva, M. and Cantoni, M. and Ciccacci, F. and Von Kanel, H. and Norga, G.J.},
    Year = {2006},
    Number = {4-5 SPEC. ISS.},
    Pages = {701--705},
    Volume = {9},
    __markedentry = {[User:6]},
    Abstract = {During the deposition process of high-k gate oxides on Ge, the Ge interface tends to be oxidized to form GeOx, leading to the introduction of interface states which compromise transistor performance. It has been suggested that a Ba termination layer on Ge could fulfill the same passivating role on Ge as reported for Sr on Si. In this paper, we present LEED, UPS and XPS studies on the effect of Ba overlayers on the chemical and electrical passivation of Ge(1 0 0). For 1 ML coverage, the adsorbate phase has (1--1) symmetry, as observed by LEED. Ba is seen to significantly increase the oxidation tendency of the Ge(1 0 0) surface. Using UPS, 1 ML Ba was seen to reduce surface band bending by 200 meV on n-type Ge, suggesting that Ba deposition causes transfer of electrons to the Ge substrate, resulting in a surface dipole. The role of this dipole in oxidation enhancement and possible electronic passivation effects is discussed. © 2006 Elsevier Ltd. All rights reserved.},
    Address = {L-NESS, Department of Physics, Politecnico di Milano, Via Anzani 42, I-22100 Como, Italy},
    Booktitle = {Materials Science in Semiconductor Processing},
    Comment = {Cited By :6
    Export Date: 26 June 2015},
    Keywords = {Chemical and electrical passivation, Oxidation},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33845216722&partnerID=40&md5=08a56310eb1b8a36f5fbf2f23c52256e}
    }
  • L. Signorini, M. Riva, M. Cantoni, R. Bertacco, and F. Ciccacci, “Epitaxial La2 / 3Sr1 / 3MnO3 thin films with unconventional magnetic and electric properties near the Curie temperature,” , vol. 515, iss. 2 SPEC. ISS., p. 496–499, 2006.
    [Bibtex]
    @Article{Signorini2006,
    Title = {Epitaxial La2 / 3Sr1 / 3MnO3 thin films with unconventional magnetic and electric properties near the Curie temperature},
    Author = {Signorini, L. and Riva, M. and Cantoni, M. and Bertacco, R. and Ciccacci, F.},
    Year = {2006},
    Number = {2 SPEC. ISS.},
    Pages = {496--499},
    Volume = {515},
    __markedentry = {[User:6]},
    Abstract = {We used Pulsed Laser Deposition (PLD) in oxidizing environment to epitaxially grow optimally doped manganite La2 / 3Sr1 / 3MnO3 (LSMO) thin films over a (001) oriented SrTiO3 substrate. Synthesized samples show good room temperature magnetic properties accompanied by a peculiar extension of the metallic conduction regime to temperatures higher than the Curie point. In this paper we present a study of the dependence of transport and magnetic properties of LSMO thin films on the oxygen pressure during PLD growth. We show how interaction of the growing films with O2 molecules is fundamental for a correct synthesis and in which way it is possible to adjust PLD experimental parameters in order to tune LSMO thin film properties. The persistence of the metallic conduction regime above the Curie temperature indicates some minor changes of the electronic structure near the Fermi level, which is responsible for the half-metallic behavior of LSMO at low temperature. This feature is rather intriguing from the technological point of view, as it could pave the way to the increase of operating temperature of devices based on LSMO. © 2006 Elsevier B.V. All rights reserved.},
    Address = {L-NESS, Dipartimento di Fisica, Politecnico di Milano, Via Anzani 52, I-22100 Como, Italy},
    Booktitle = {Thin Solid Films},
    Comment = {Cited By :6
    Export Date: 26 June 2015},
    Keywords = {Magnetic thin films, Manganites, Pulsed laser deposition},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33748746044&partnerID=40&md5=f0bd7a539f29e2e03dbacf160307d38a}
    }

2005

  • R. Bertacco, M. Cantoni, M. Riva, A. Tagliaferri, and F. Ciccacci, “Epitaxial growth and characterization of layered magnetic nanostructures,” , vol. 252, iss. 5, p. 1754–1764, 2005.
    [Bibtex]
    @Article{Bertacco2005a,
    Title = {Epitaxial growth and characterization of layered magnetic nanostructures},
    Author = {Bertacco, R. and Cantoni, M. and Riva, M. and Tagliaferri, A. and Ciccacci, F.},
    Year = {2005},
    Number = {5},
    Pages = {1754--1764},
    Volume = {252},
    __markedentry = {[User:6]},
    Abstract = {We describe the construction and operation of an ultrahigh-vacuum system devoted to the study of layered magnetic nanostructures. The apparatus includes two growth chambers, where specimens nanostructured along the direction of growth (heterostructures, nanometric and subnanometric thin films and multilayers) are deposited either by molecular beam epitaxy or pulsed laser deposition, and a measurement chamber, where they are analyzed in situ by a variety of electron spectroscopies. Magnetic characterization is obtained by spin resolved inverse photoemission spectroscopy and magneto optical Kerr effect technique. Vacuum transfer towards other experimental facilities is also available. As examples of application, results from half metallic magnetic oxides, such as magnetite (Fe3O4) and manganite (La 2/3Sr1/3MnO3) thin films, and ferromagnet/semiconductor interfaces (Fe/Ge(0 0 1)) are also reported. © 2005 Elsevier B.V. All rights reserved.},
    Address = {LNESS, Dipartimento di Fisica, Politecnico di Milano, via Anzani 52, Como, Italy},
    Booktitle = {Applied Surface Science},
    Comment = {Cited By :25
    Export Date: 26 June 2015},
    Keywords = {Epitaxial growth, Spin resolved electron spectroscopy, Spintronics, Thin magnetic films},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-27944475977&partnerID=40&md5=a3e1ac80407569e6e58f55504614574a}
    }
  • R. Bertacco, M. Riva, M. Cantoni, L. Signorini, and F. Ciccacci, “Epitaxial la2/3Sr1/3MnO3 thin films with metallic behavior above the Curie temperature,” , vol. 86, iss. 25, p. 1–3, 2005.
    [Bibtex]
    @Article{Bertacco2005,
    Title = {Epitaxial la2/3Sr1/3MnO3 thin films with metallic behavior above the Curie temperature},
    Author = {Bertacco, R. and Riva, M. and Cantoni, M. and Signorini, L. and Ciccacci, F.},
    Year = {2005},
    Number = {25},
    Pages = {1--3},
    Volume = {86},
    __markedentry = {[User:6]},
    Abstract = {Despite its half-metallic character, La2/3Sr 1/3MnO3 is currently not considered a good candidate for real spin electronic devices due to the dramatic deterioration of its spin polarization at room temperature. Using pulsed-laser deposition, we have grown thin films of La2/3Sr1/3MnO3, which display good room-temperature magnetic properties accompanied by a sizable increase of the temperature at which the metal-insulator transition takes place with respect to the Curie temperature. The persistence of the metallic character well above the Curie temperature indicates minor modifications of the electronic structure near the Fermi level, which is responsible for the half-metallicity. These films are good candidates for increasing the operating temperature of devices based on La2/3Sr1/3MnO3. © 2005 American Institute of Physics.},
    Address = {L-NESS, Dipartimento di Fisica Del Politecnico di Milano, via Anzani 52, 22100 Como, Italy},
    Booktitle = {Applied Physics Letters},
    Comment = {Cited By :21
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-24344460369&partnerID=40&md5=4f01348ff18c1bb0f406d031540dff35}
    }
  • M. Bowen, A. Barthelemy, M. Bibes, E. Jacquet, J. -P. Contour, A. Fert, F. Ciccacci, L. Duò, and R. Bertacco, “Spin-polarized tunneling spectroscopy in tunnel junctions with half-metallic electrodes,” , vol. 95, iss. 13, p. –, 2005.
    [Bibtex]
    @Article{Bowen2005,
    Title = {Spin-polarized tunneling spectroscopy in tunnel junctions with half-metallic electrodes},
    Author = {Bowen, M. and Barthelemy, A. and Bibes, M. and Jacquet, E. and Contour, J.-P. and Fert, A. and Ciccacci, F. and Duò, L. and Bertacco, R.},
    Year = {2005},
    Number = {13},
    Pages = {--},
    Volume = {95},
    __markedentry = {[User:6]},
    Abstract = {We have studied the magnetoresistance (TMR) of tunnel junctions with electrodes of La2/3Sr1/3MnO3 and we show how the variation of the conductance and TMR with the bias voltage can be exploited to obtain precise information on the spin and energy dependence of the density of states. Our analysis leads to a quantitative description of the band structure of La2/3Sr1/3MnO3 including the energy gap δ between the Fermi level and the bottom of the t2g minority-spin band, in good agreement with data from spin-polarized inverse photoemission experiments. This shows the potential of magnetic tunnel junctions with half-metallic electrodes for spin-resolved spectroscopic studies. © 2005 The American Physical Society.},
    Address = {Dipartimento di Fisica del Politecnico di Milano, INFM, L-NESS, via Anzani 52, 22100 Como, Italy},
    Booktitle = {Physical Review Letters},
    Comment = {Cited By :55
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-27144485194&partnerID=40&md5=bce53f446fb5c00ca97dab1d4dd6d962}
    }
  • A. Brambilla, P. Biagioni, M. Portalupi, M. Zani, M. Finazzi, L. Du, P. Vavassori, R. Bertacco, and F. Ciccacci, “Magnetization reversal properties of Fe NiO Fe(001) trilayers,” , vol. 72, iss. 17, p. –, 2005.
    [Bibtex]
    @Article{Brambilla2005a,
    Title = {Magnetization reversal properties of Fe NiO Fe(001) trilayers},
    Author = {Brambilla, A. and Biagioni, P. and Portalupi, M. and Zani, M. and Finazzi, M. and Du, L. and Vavassori, P. and Bertacco, R. and Ciccacci, F.},
    Year = {2005},
    Number = {17},
    Pages = {--},
    Volume = {72},
    __markedentry = {[User:6]},
    Abstract = {We have investigated the magnetic properties of epitaxially grown Fe NiO Fe(001) trilayers for different thickness combinations of the NiO spacer and of the Fe overlayer. The magneto optical Kerr effect has been exploited to study the in-plane magnetization reversal processes in the iron layers. Further information has been obtained by means of spin polarized inverse photoemission spectroscopy. We show the existence of a critical value tc of the NiO thickness tAFM for the magnetic coupling between the Fe layers at zero applied field: for tAFM
  • A. Brambilla, L. Du, M. Cantoni, M. Riva, R. Bertacco, M. Portalupi, and F. Ciccacci, "Onset of ferromagnetism in ultrathin Fe films on semiconductors," , vol. 135, iss. 3, p. 158–161, 2005.
    [Bibtex]
    @Article{Brambilla2005,
    Title = {Onset of ferromagnetism in ultrathin Fe films on semiconductors},
    Author = {Brambilla, A. and Du, L. and Cantoni, M. and Riva, M. and Bertacco, R. and Portalupi, M. and Ciccacci, F.},
    Year = {2005},
    Number = {3},
    Pages = {158--161},
    Volume = {135},
    __markedentry = {[User:6]},
    Abstract = {Very thin Fe films have been grown by molecular beam epitaxy on Ge(001), GaAs(001) and ZnSe(001) substrates, under identical preparation conditions. The electronic and magnetic properties of such interfaces have been studied, as a function of the Fe thickness, by means of spin resolved inverse photoemission. From the spin dependence of Fe empty states, we observe the onset of room temperature ferromagnetism to occur at a Fe thickness as low as three monolayers (ML) for Fe/Ge, while 5 and 8 ML have been found for Fe/GaAs and Fe/ZnSe, respectively. © 2005 Elsevier Ltd. All rights reserved.},
    Address = {L-NESS-Dipartimento di Fisica, Politecnico di Milano, Via Anzani 52, 22100 Como, Italy},
    Booktitle = {Solid State Communications},
    Comment = {Cited By :7
    Export Date: 26 June 2015},
    Keywords = {A. Magnetic films and multilayers, A. Semiconductors, A. Surfaces and interfaces, D. Electronic band structure},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-20344379469&partnerID=40&md5=b2257384cc180220cb6fbc8985f6de04}
    }
  • M. Cantoni, M. Riva, G. Isella, R. Bertacco, and F. Ciccacci, "Fe thin films grown on single-crystal and virtual Ge(001) substrates," , vol. 97, iss. 9, p. –, 2005.
    [Bibtex]
    @Article{Cantoni2005,
    Title = {Fe thin films grown on single-crystal and virtual Ge(001) substrates},
    Author = {Cantoni, M. and Riva, M. and Isella, G. and Bertacco, R. and Ciccacci, F.},
    Year = {2005},
    Number = {9},
    Pages = {--},
    Volume = {97},
    __markedentry = {[User:6]},
    Abstract = {Thin Fe films have been epitaxially grown at room temperature on standard single-crystal Ge(001) substrates and virtual GeSi (001) substrates. Their structural, magnetic, and electronic properties have been investigated in situ by spin-polarized inverse photoemission, x-ray photoemission spectroscopy, x-ray photoelectron diffraction, low-energy electron diffraction, and magneto-optical Kerr effect. In both cases Fe grows in a layer-by-layer fashion with very low Ge incorporation in the film (less than 3%) and the bcc local structure becomes evident for coverage larger than 5 ML. The onset of ferromagnetism appears definitively at 3 ML, while the coercive field and the spin polarization of unoccupied Fe states increase with thickness up to 30 ML. The overall behavior is very similar in the case of standard and virtual substrates, so the latter can be employed for growing high-quality FeGe interfaces. © 2005 American Institute of Physics.},
    Address = {Laboratorio per Nanostrutture Epitassiali su Silicio e per Spintronica (L-NESS), Dipartimento di Fisica del Politecnico di Milano, via Anzani 52, 22100 Como, Italy},
    Booktitle = {Journal of Applied Physics},
    Comment = {Cited By :10
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-18844402178&partnerID=40&md5=62ba06a9b6279bc1dbbb52d18c4b4be9}
    }
  • U. Laders, M. Bibes, J. -F. Bobo, M. Cantoni, R. Bertacco, and J. Fontcuberta, "Enhanced magnetic moment and conductive behavior in Ni Fe2 O4 spinel ultrathin films," , vol. 71, iss. 13, p. –, 2005.
    [Bibtex]
    @Article{LAders2005,
    Title = {Enhanced magnetic moment and conductive behavior in Ni Fe2 O4 spinel ultrathin films},
    Author = {Laders, U. and Bibes, M. and Bobo, J.-F. and Cantoni, M. and Bertacco, R. and Fontcuberta, J.},
    Year = {2005},
    Number = {13},
    Pages = {--},
    Volume = {71},
    __markedentry = {[User:6]},
    Abstract = {Bulk Ni Fe2 O4 is an insulating ferrimagnet. Here, we report on the epitaxial growth of spinel Ni Fe2 O4 ultrathin films onto SrTi O3 single crystals. We will show that-under appropriate growth conditions-epitaxial stabilization leads to the formation of a spinel phase with magnetic and electrical properties that radically differ from those of the bulk material: an enhanced magnetic moment (MS) -about 250% larger-and a metallic character. A systematic study of the thickness dependence of MS allows us to conclude that its enhanced value is due to an anomalous distribution of the Fe and Ni cations among the A and B sites of the spinel structure resulting from the off-equilibrium growth conditions and to interface effects. The relevance of these findings for spinel- and, more generally, oxide-based heterostructures is discussed. We will argue that this novel material could be an alternative ferromagetic-metallic electrode in magnetic tunnel junctions. © 2005 The American Physical Society.},
    Address = {INFM and L-NESS, Dipartimento di Fisica del Politecnico di Milano, via Anzani 52, 22100 Como, Italy},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :77
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-28744433013&partnerID=40&md5=87385f3e8ad96c38b6af4b453d63a588}
    }

2004

  • R. Bertacco, M. Riva, M. Cantoni, F. Ciccacci, M. Portalupi, A. Brambilla, L. Du, P. Vavassori, F. Gustavsson, J. -M. George, M. Marangolo, M. Eddrief, and V. H. Etgens, "Electronic, magnetic, and structural properties of the Fe/ZnSe interface," , vol. 69, iss. 5, p. 544211–544217, 2004.
    [Bibtex]
    @Article{Bertacco2004,
    Title = {Electronic, magnetic, and structural properties of the Fe/ZnSe interface},
    Author = {Bertacco, R. and Riva, M. and Cantoni, M. and Ciccacci, F. and Portalupi, M. and Brambilla, A. and Du, L. and Vavassori, P. and Gustavsson, F. and George, J.-M. and Marangolo, M. and Eddrief, M. and Etgens, V.H.},
    Year = {2004},
    Number = {5},
    Pages = {544211--544217},
    Volume = {69},
    __markedentry = {[User:6]},
    Abstract = {The electronic, magnetic, and structural properties of Fe thin films epitaxially grown on ZnSe(001) have been investigated by spin polarized inverse photoemission, x-ray photoemission, magneto-optical Kerr effect, and scanning tunneling microscopy. Ultrathin Fe films present no magnetic remanence, while ferromagnetism develops for Fe coverage larger than 7 ML. However, even in this case, the electronic structure of empty states is quite different from that of high quality Fe(001) films. These findings are interpreted in terms of an evolution from a low coverage superparamagnetic phase towards a ferromagnetic phase typical of thicker films, whose electronic properties still remain different from those of ideal Fe(001) films. The consequences for spin-dependent transport across the Fe/ZnSe(001) interface are discussed.},
    Address = {Micronic Laser Systems, Nytorpsvägen 9, 3141SE-183 03 Täby, Sweden},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :19
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-12144291214&partnerID=40&md5=25d9e78967e59c1341586d905e944426}
    }
  • M. Cantoni and R. Bertacco, "High efficiency apparatus for spin polarized inverse photoemission," , vol. 75, iss. 7, p. 2387–2392, 2004.
    [Bibtex]
    @Article{Cantoni2004,
    Title = {High efficiency apparatus for spin polarized inverse photoemission},
    Author = {Cantoni, M. and Bertacco, R.},
    Year = {2004},
    Number = {7},
    Pages = {2387--2392},
    Volume = {75},
    __markedentry = {[User:6]},
    Abstract = {A compact and efficient apparatus for spin polarized inverse photoemission coupling a spin resolved electron gun with a bandpass detector at 9.3 eV photon energy was analyzed. Some examples of application of the entire apparatus to the case of Ag(001) and Fe(001)-p(1--1)O surfaces were described. A sizable increase of the solid collection angle for photons was provided by the detector placed all around the electron gun. It was shown that the apparatus has an overall energy resolution of 0.75 eV and an efficiency of 3000 cps/μA as measured on Ag(001), three times better than the best value reported in literature.},
    Address = {INFM and L-NESS, Dipartimento di Fisica, Politecnico di Milano, via Anzani 52, 22100 Como, Italy},
    Booktitle = {Review of Scientific Instruments},
    Comment = {Cited By :13
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-3843094832&partnerID=40&md5=a3bbe35af41738558614a141ffe544da}
    }
  • M. Portalupi, R. Bertacco, M. Cantoni, A. Brambilla, M. Riva, D. L., and F. Ciccacci, "Electronic and magnetic properties of the Fe/ZnSe(0 01) interface," , vol. 272-276, iss. III, p. 1907–1908, 2004.
    [Bibtex]
    @Article{Portalupi2004,
    Title = {Electronic and magnetic properties of the Fe/ZnSe(0 01) interface},
    Author = {Portalupi, M. and Bertacco, R. and Cantoni, M. and Brambilla, A. and Riva, M. and Du L. and Ciccacci, F.},
    Year = {2004},
    Number = {III},
    Pages = {1907--1908},
    Volume = {272-276},
    __markedentry = {[User:6]},
    Abstract = {The electronic, magnetic and structural properties of thin Fe films epitaxially grown on ZnSe(001) have been investigated by means of spin resolved inverse photoemission and low energy electron diffraction. Ultrathin Fe films grown on ZnSe(001) present no magnetic remanence, while ferromagnetism develops for coverages greater than 8 monolayers. These findings are interpreted in terms of an evolution from a low coverage superparamagnetic phase towards a ferromagnetic phase typical of thicker films. © 2003 Elsevier B.V. All rights reserved.},
    Address = {INFM, Dipartimento di Fisica, Politecnico di Milano, p.za Leonardo da Vinci 32, Milano 20133, Italy},
    Booktitle = {Journal of Magnetism and Magnetic Materials},
    Comment = {Cited By :2
    Export Date: 26 June 2015},
    Keywords = {Ferromagnetism, Interfaces, Spintronics, Thin films, ZnSe},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-23044440479&partnerID=40&md5=c3582d54eceaae1c15cd23b8c552def4}
    }

2002

  • R. Bertacco, J. P. Contour, A. Barthelemy, and J. Olivier, "Evidence for strontium segregation in La0.7Sr0.3MnO3 thin films grown by pulsed laser deposition: Consequences for tunnelling junctions," , vol. 511, iss. 1-3, p. 366–372, 2002.
    [Bibtex]
    @Article{Bertacco2002a,
    Title = {Evidence for strontium segregation in La0.7Sr0.3MnO3 thin films grown by pulsed laser deposition: Consequences for tunnelling junctions},
    Author = {Bertacco, R. and Contour, J.P. and Barthelemy, A. and Olivier, J.},
    Year = {2002},
    Number = {1-3},
    Pages = {366--372},
    Volume = {511},
    __markedentry = {[User:6]},
    Abstract = {This work addresses the issue of the quality of La0.7Sr0.3MnO3 (LSMO) surfaces integrated in tunnelling junctions. From a detailed X-ray photoemission spectroscopy analysis it results that Sr segregates at the surface of LSMO films grown by pulsed laser deposition at high O2 pressure (350 mTorr). This fact is attributed to the presence of an outermost SrO layer, which is critical for the subsequent formation of a good LSMO/insulator interface. In particular we found that the unique properties of the junctions employing SrTiO3 as insulator, are strictly correlated to the integration of the SrO segregated layer in the SrTiO3 structure. © 2002 Elsevier Science B.V. All rights reserved.},
    Address = {TRT, 91404 Orsay Cedex, France},
    Booktitle = {Surface Science},
    Comment = {Cited By :52
    Export Date: 26 June 2015},
    Keywords = {Heterojunctions, Magnetic interfaces, Photoelectron diffraction, Surface segregation, X-ray photoelectron spectroscopy},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0036609298&partnerID=40&md5=01be72474f51671ed5ca34dd2f54aac2}
    }
  • R. Bertacco, M. Marcon, G. Trezzi, L. Du, and F. Ciccacci, "Spin and energy analysis of electron beams: Coupling a polarimeter based on exchange scattering to a hemispherical analyzer," , vol. 73, iss. 11, p. 3867–, 2002.
    [Bibtex]
    @Article{Bertacco2002b,
    Title = {Spin and energy analysis of electron beams: Coupling a polarimeter based on exchange scattering to a hemispherical analyzer},
    Author = {Bertacco, R. and Marcon, M. and Trezzi, G. and Du, L. and Ciccacci, F.},
    Year = {2002},
    Number = {11},
    Pages = {3867--},
    Volume = {73},
    __markedentry = {[User:6]},
    Address = {INFM-Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Review of Scientific Instruments},
    Comment = {Cited By :12
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-18744368471&partnerID=40&md5=9047cea25524366f8aa3d5f93d6b4b3e}
    }
  • R. Bertacco, M. Portalupi, M. Marcon, L. Du, F. Ciccacci, M. Bowen, J. P. Contour, and A. Barthélémy, "Unoccupied electron states of La0.7Sr0.3MnO3," , vol. 242-245, iss. PART II, p. 710–712, 2002.
    [Bibtex]
    @Article{Bertacco2002,
    Title = {Unoccupied electron states of La0.7Sr0.3MnO3},
    Author = {Bertacco, R. and Portalupi, M. and Marcon, M. and Du, L. and Ciccacci, F. and Bowen, M. and Contour, J.P. and Barthélémy, A.},
    Year = {2002},
    Number = {PART II},
    Pages = {710--712},
    Volume = {242-245},
    __markedentry = {[User:6]},
    Abstract = {Electronic states of La0.7Sr0.3MnO3 (LSMO) were analyzed just above Fermi level. Analysis was performed using spin polarized inverse photoemission at different temperatures. A 350 Ȧ thick film of LSMO was grown by pulsed laser deposition on a SrTiO3 substrate. The low temperature half-metallicity was evident in the empty electron density of states, as it resulted from the spin-resolved spectra taken at 100 K.},
    Address = {INFM, Dipartimento di Fisica, Politecnico di Milano, P.za L. da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Journal of Magnetism and Magnetic Materials},
    Comment = {Cited By :21
    Export Date: 26 June 2015},
    Keywords = {Electronic structure, Magnetic oxides, Surface magnetism, Thin films - magnetic},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0036544087&partnerID=40&md5=c148abd122d35058cfec6eaf62970d28}
    }
  • M. Bowen, R. Bertacco, A. Barthemy, M. Portalupi, M. Marcon, L. Duo, F. Cicacci, J. P. Contour, A. Fert, F. Petroff, E. Jacquet, J. Humbert, and A. Vauras, "Understanding the bias dependence of magnetoresistance in the system La0.7Sr0.3MnO3/SrTiO3/Co," in Digests of the Intermag Conference, Université Paris-Sud, 91405 Orsay Cedex, France, 2002, p. –.
    [Bibtex]
    @InProceedings{Bowen2002,
    Title = {Understanding the bias dependence of magnetoresistance in the system La0.7Sr0.3MnO3/SrTiO3/Co},
    Author = {Bowen, M. and Bertacco, R. and Barthemy, A. and Portalupi, M. and Marcon, M. and Duo, L. and Cicacci, F. and Contour, J.P. and Fert, A. and Petroff, F. and Jacquet, E. and Humbert, J. and Vauras, A.},
    Booktitle = {Digests of the Intermag Conference},
    Year = {2002},
    Address = {Université Paris-Sud, 91405 Orsay Cedex, France},
    Pages = {--},
    __markedentry = {[User:6]},
    Abstract = {The bias dependence of magnetoresistance in the La0.7Sr0.3MnO3/SrTiO3/Co system was studied. The inverse photoemission experiments was carried out to determine the possible influence of the spin-polarized unoccupied density of states of La0.7Sr0.3MnO3. The role of the crystallinity of the SrTiO3 barrier was also discussed.},
    Comment = {Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0036913140&partnerID=40&md5=951f1ab13e9112875c10e46c8c10d6ea}
    }
  • L. Du, M. Portalupi, M. Marcon, R. Bertacco, and F. Ciccacci, "Epitaxial thin NiO films grown on Fe(0 0 1) and the effect of temperature," , vol. 518, iss. 3, p. 234–242, 2002.
    [Bibtex]
    @Article{DuA2002,
    Title = {Epitaxial thin NiO films grown on Fe(0 0 1) and the effect of temperature},
    Author = {Du, L. and Portalupi, M. and Marcon, M. and Bertacco, R. and Ciccacci, F.},
    Year = {2002},
    Number = {3},
    Pages = {234--242},
    Volume = {518},
    __markedentry = {[User:6]},
    Abstract = {Thin NiO(0 0 1) films have been epitaxially grown on a ferromagnetic Fe substrate. They have been investigated by X-ray photoemission and spin-resolved inverse photoemission spectroscopies, and compared with films grown in the same conditions on Ag(0 0 1). Well ordered and good quality films are obtained in most cases, while defect states within the fundamental gap are detected only in few cases. Upon annealing these films above 600 K a Ni-Fe substitution reaction occurs in the film, leading to the formation of an Fe oxide film at the surface, while Ni atoms dissolve into the substrate. © 2002 Elsevier Science B.V. All rights reserved.},
    Address = {INFM-Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Surface Science},
    Comment = {Cited By :23
    Export Date: 26 June 2015},
    Keywords = {Inverse photoemission spectroscopy, Iron, Magnetic surfaces, Metal-insulator interfaces, Nickel oxides, Single crystal epitaxy, Surface segregation},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0037145347&partnerID=40&md5=794e0d9ef06754523fb1de7d10682713}
    }
  • G. Isella, M. Marcon, R. Bertacco, G. Trezzi, N. Incorvaia, F. Ciccacci, and L. Duò, "Versatile apparatus for investigating ultrathin magnetic films," , vol. 122, iss. 3, p. 221–229, 2002.
    [Bibtex]
    @Article{Isella2002,
    Title = {Versatile apparatus for investigating ultrathin magnetic films},
    Author = {Isella, G. and Marcon, M. and Bertacco, R. and Trezzi, G. and Incorvaia, N. and Ciccacci, F. and Duò, L.},
    Year = {2002},
    Number = {3},
    Pages = {221--229},
    Volume = {122},
    __markedentry = {[User:6]},
    Abstract = {We describe the construction and operation of an ultrahigh-vacuum system devoted to the study of thin film magnetism. The apparatus includes a growth chamber, where ultrathin films are deposited by molecular beam epitaxy, and a measurement chamber, where they are analyzed by a variety of electron spectroscopies. The electron spin can be controlled by using a fully characterized spin resolved electron gun and polarization analyzers. Test measurements on in situ grown Fe/MgO(001) samples are also presented as illustration of the system performances. © 2002 Elsevier Science B.V. All rights reserved.},
    Address = {INFMDipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Journal of Electron Spectroscopy and Related Phenomena},
    Comment = {Cited By :2
    Export Date: 26 June 2015},
    Keywords = {Spin-polarization, Spin-resolved electron spectroscopies, Thin film and surface magnetism},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0036498258&partnerID=40&md5=5ecb00080d63e5420aa6c70caf927f6a}
    }
  • G. Isella, M. Marcon, R. Bertacco, G. Trezzi, N. Incorvaia, F. Ciccacci, and L. Du, "Erratum: Versatile apparatus for investigating ultrathin magnetic films (Journal of Electron Spectroscopy & Related Phenomena 122:3 (221-229) PII: S0368204801003590)," , vol. 125, iss. 1, p. 77–, 2002.
    [Bibtex]
    @Article{Isella2002a,
    Title = {Erratum: Versatile apparatus for investigating ultrathin magnetic films (Journal of Electron Spectroscopy \& Related Phenomena 122:3 (221-229) PII: S0368204801003590)},
    Author = {Isella, G. and Marcon, M. and Bertacco, R. and Trezzi, G. and Incorvaia, N. and Ciccacci, F. and Du, L.},
    Year = {2002},
    Number = {1},
    Pages = {77--},
    Volume = {125},
    __markedentry = {[User:6]},
    Address = {INFM-Dipartimento Di Fisica Politecnico Di Milano, piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Journal of Electron Spectroscopy and Related Phenomena},
    Comment = {Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0036680791&partnerID=40&md5=4ce382683391ed7b0ab25b6b382ce0f8}
    }

2001

  • R. Bertacco, L. Du, G. Isella, M. Marcon, and F. Ciccacci, "A new analyzer for spin resolved electron spectroscopies," , vol. 226-230, iss. PART II, p. 2076–2077, 2001.
    [Bibtex]
    @Article{Bertacco2001,
    Title = {A new analyzer for spin resolved electron spectroscopies},
    Author = {Bertacco, R. and Du, L. and Isella, G. and Marcon, M. and Ciccacci, F.},
    Year = {2001},
    Number = {PART II},
    Pages = {2076--2077},
    Volume = {226-230},
    __markedentry = {[User:6]},
    Abstract = {We have developed a new instrument which performs simultaneously energy and spin-polarization analysis of an electron beam, to be used in spin resolved electron spectroscopies from magnetic surfaces and thin films. The device consists of a novel polarization detector with high efficiency and analyzing power coupled to a large commercial hemispherical energy analyzer (HEA). The spin Polarimeter is based on the spin dependence of the low energy (4-6 eV kinetic energy) reflectivity from a magnetic target, namely a Fe(001)-p(1 -- 1)O surface. We describe reliable target preparation procedures and the design of the electron-optical system transferring the electrons from the HEA exit slit to the Polarimeter target. © 2001 Elsevier Science B.V. All rights reserved.},
    Address = {INFM-Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Journal of Magnetism and Magnetic Materials},
    Comment = {Cited By :1
    Export Date: 26 June 2015},
    Keywords = {Electron spectroscopy, Spin polarization, Surface magnetism},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-65449170620&partnerID=40&md5=47f831470a5e9fc91ffec33045b0ea3b}
    }
  • G. Isella, R. Bertacco, L. Duò, and F. Ciccacci, "Electronic and magnetic properties of the oxygen assisted grown Fe/Cr/Fe(001) trilayers," , vol. 373-376, p. 169–172, 2001.
    [Bibtex]
    @Other{Isella2001,
    Title = {Electronic and magnetic properties of the oxygen assisted grown Fe/Cr/Fe(001) trilayers},
    __markedentry = {[User:6]},
    Abstract = {Fe/Cr/Fe(001) trilayers have been studied by means of spin polarized inverse photoemission and absorbed current spectroscopies. A reversal of the magnetic ordering of the Fe overlayer with respect to the buried Fe substrate as a function of the Cr spacer thickness is observed, confirming the oscillating transition from ferromagnetic (FM) to antiferromagnetic (AF) coupling between the Fe layers. The possible surfactant action of oxygen in the trilayer growth has also been investigated using a Fe(001)-p(1--1)O surface as a substrate, with the aim of obtaining more ordered interfaces. It is found that the FM-AF oscillations in Fe/Cr/ Fe(001)-p(1--1)O occurs with the same periodicity as in Fe/Cr/Fe trilayers grown at room temperature, namely 12 monolayers (ML), while a short 2 ML period, observed in high temperature grown samples, is absent.},
    Address = {INFM - Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Author = {Isella, G. and Bertacco, R. and Duò, L. and Ciccacci, F.},
    Booktitle = {Materials Science Forum},
    Comment = {Export Date: 26 June 2015},
    Keywords = {Metal interfaces, Spin polarized electron spectroscopies, Thin film magnetism},
    Owner = {User},
    Pages = {169--172},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0035179001&partnerID=40&md5=525553baa87f9537dd0b8a4886d1f038},
    Volume = {373-376},
    Year = {2001}
    }
  • M. Portalupi, L. Du, G. Isella, R. Bertacco, M. Marcon, and F. Ciccacci, "Electronic structure of epitaxial thin NiO(100) films grown on AG(100): Towards a firm experimental basis," , vol. 64, iss. 16, p. 1654021–1654024, 2001.
    [Bibtex]
    @Article{Portalupi2001,
    Title = {Electronic structure of epitaxial thin NiO(100) films grown on AG(100): Towards a firm experimental basis},
    Author = {Portalupi, M. and Du, L. and Isella, G. and Bertacco, R. and Marcon, M. and Ciccacci, F.},
    Year = {2001},
    Number = {16},
    Pages = {1654021--1654024},
    Volume = {64},
    __markedentry = {[User:6]},
    Abstract = {Valence- and conduction-band states of NiO(100) thin films grown onto Ag(100) have been probed by photoemission (PE) and inverse photoemission (IPE) spectroscopy, respectively. In particular, emphasis is given to the empty states, for which contrasting data are reported on samples obtained by different procedures. The good quality of the investigated NiO sample surface has allowed us to deduce a reliable picture of the empty state spectral function. Exploiting k resolution it was possible to disentangle the various orbital contributions and clearly fix their energy position, including that of the so-called ligand hole excitation. A combined PE and IPE analysis points towards the nearly intrinsic nature of the investigated NiO.},
    Address = {INFM-Dipartimento di Fisica, Politecnico di Milano, piazza L. Da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :21
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0035886391&partnerID=40&md5=c5334b5a26390941e4b8a73b83b33313}
    }

2000

  • R. Bertacco, G. Isella, L. Du, F. Ciccacci, A. Di Bona, P. Luches, and S. Valeri, "Structural and electronic properties of thin Co films on Fe(001) and Fe(001)-p(1x1)O in the bct-to-hcp transition regime," , vol. 454, iss. 1, p. 671–675, 2000.
    [Bibtex]
    @Article{Bertacco2000,
    Title = {Structural and electronic properties of thin Co films on Fe(001) and Fe(001)-p(1x1)O in the bct-to-hcp transition regime},
    Author = {Bertacco, R. and Isella, G. and Du, L. and Ciccacci, F. and Di Bona, A. and Luches, P. and Valeri, S.},
    Year = {2000},
    Number = {1},
    Pages = {671--675},
    Volume = {454},
    __markedentry = {[User:6]},
    Abstract = {We present a combined study of structural and electronic properties of thin Co films (up to 50 ML) grown on Fe(001). By means of primary-beam diffraction modulated electron emission, we found a structural transition between a strained bcc structure (bct) and the stable hcp phase occurring at approximately 15 ML Co coverage. This structural change has a counterpart in the unoccupied electron states of the Co overlayer, as seen by absorbed current spectroscopy. We demonstrate that the evolution of AC spectra can be used to monitor the mentioned transition and apply this technique to the case of Co grown Fe(001)-p(1--1)O. It is found that the presence of the oxygen causes a delayed onset of the bct-hcp transition.},
    Address = {INFM - Dipartimento di Fisica, Univ. Modena, Via G. C., Modena, Italy},
    Booktitle = {Surface Science},
    Comment = {Cited By :2
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0033703226&partnerID=40&md5=cf78743c7f7852f940955871081abc15}
    }
  • L. Du, R. Bertacco, G. Isella, F. Ciccacci, and M. Richter, "Electronic and magnetic properties of the Co/Fe(001) interface and the role of oxygen," , vol. 61, iss. 22, p. 15294–15301, 2000.
    [Bibtex]
    @Article{DuA2000,
    Title = {Electronic and magnetic properties of the Co/Fe(001) interface and the role of oxygen},
    Author = {Du, L. and Bertacco, R. and Isella, G. and Ciccacci, F. and Richter, M.},
    Year = {2000},
    Number = {22},
    Pages = {15294--15301},
    Volume = {61},
    __markedentry = {[User:6]},
    Abstract = {A combined theoretical and experimental study of the structural, electronic, and magnetic properties of a Co thin film growth onto Fe(001) substrate is reported. This includes also an analysis of the role of oxygen in modifying the properties of the Co/Fe interaction. Experimental results obtained by spin-resolved absorbed current and inverse photoemission spectroscopies, as probes of the empty electron states, show nice agreement with first-principles full-potential local-orbital calculations. Co growth has been shown to display different paths according to various conditions. The Co/Fe(001) interface shows a distorted cubic Co growth (known as bct) up to about 15 monolayers (ML) turning to the equilibrium hcp Co structure for larger thickness. Co growth onto the surface oxidized Fe(001)-p(1--1)O shows a similar behavior with an extended stability range of the bet structure up to about 35 ML. Spin-dependent effects are, moreover, enhanced due to an oxygen surfactant action. FeCo(001) formation is shown to take place by thermal treatment of the interface. Its features are interpreted in terms of band filling arguments, and the surface oxidation displays again a considerable enhancement of spin-dependent effects in analogy with the surface oxidation of pure Fe(001). ©2000 The American Physical Society.},
    Address = {Dept. of Theor. Solid State Physics, IFW Dresden e. V., P.O. Box 270016, D-01171 Dresden, Germany},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :18
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0000241942&partnerID=40&md5=726ed59f5d85c80a054fd9851c4d7fe2}
    }
  • G. Isella, R. Bertacco, L. Du, and F. Ciccacci, "Magnetic coupling in Fe/Cr/Fe(001) by spin-resolved empty-state spectroscopies," , vol. 454, iss. 1, p. 909–913, 2000.
    [Bibtex]
    @Article{Isella2000,
    Title = {Magnetic coupling in Fe/Cr/Fe(001) by spin-resolved empty-state spectroscopies},
    Author = {Isella, G. and Bertacco, R. and Du, L. and Ciccacci, F.},
    Year = {2000},
    Number = {1},
    Pages = {909--913},
    Volume = {454},
    __markedentry = {[User:6]},
    Abstract = {We report on a study of empty electronic states in Cr/Fe(001) films and a trilayer as obtained by means of spin-polarized inverse photoemission and absorbed current spectroscopies: both spectroscopies are sensitive to the magnetic character of the Fe film. In relatively thick (>7 ML) Cr films, our data do not reveal any polarization dependence; on the contrary, in Fe/Cr/Fe(001), we observe a reversal of the magnetic ordering of the Fe overlayer with respect to the buried Fe substrate as a function of the Cr spacer thickness, confirming the oscillating transition from FM to AF coupling between the Fe layers.},
    Address = {INFM - Dipto. Fis. Politec. Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy},
    Booktitle = {Surface Science},
    Comment = {Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0033683376&partnerID=40&md5=52926e143414220d03f8ce2e864c52fc}
    }
  • G. Isella, R. Bertacco, M. Zani, L. Du, and F. Ciccacci, "Evolution of the magnetic and electronic properties of ultrathin Cr(001) films," , vol. 116, iss. 5, p. 283–286, 2000.
    [Bibtex]
    @Article{Isella2000a,
    Title = {Evolution of the magnetic and electronic properties of ultrathin Cr(001) films},
    Author = {Isella, G. and Bertacco, R. and Zani, M. and Du, L. and Ciccacci, F.},
    Year = {2000},
    Number = {5},
    Pages = {283--286},
    Volume = {116},
    __markedentry = {[User:6]},
    Abstract = {We present a spin resolved inverse photoemission study of Cr ultrathin films (up to few monolayers [ML]) grown on Ag(001) and Fe(001) at room temperature. The magnetic properties of the films are strongly influenced by the different interaction with the substrates. For the Cr/Ag(001) system, where the chemical interaction of the overlayer with the substrate is very small, no polarization dependence of the Cr features is observed, a finding which can fit within the predicted antiferromagnetism of a Cr layer. For the case of Cr/Fe(001), the Cr contribution is strongly polarized in the early stages of the interface formation (up to 2 ML) and then becomes gradually unpolarized. © 2000 Published by Elsevier Science Ltd.},
    Address = {INFM-Dipartimento di Fisica, Politecnico di Milano, piazza L. da Vinci 32, 20133 Milan, Italy},
    Booktitle = {Solid State Communications},
    Comment = {Cited By :9
    Export Date: 26 June 2015},
    Keywords = {A. Magnetic films and multilayers, E. Photoelectron spectroscopies},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0001326386&partnerID=40&md5=f9fac8a29e0577aaef94a67c34b9a0f4}
    }

1999

  • R. Bertacco and F. Ciccacci, "Large spin asymmetry in electron absorption and reflection from oxidized single crystal Fe/MgO(001) films," , vol. 419, iss. 2-3, p. 265–271, 1999.
    [Bibtex]
    @Article{Bertacco1999,
    Title = {Large spin asymmetry in electron absorption and reflection from oxidized single crystal Fe/MgO(001) films},
    Author = {Bertacco, R. and Ciccacci, F.},
    Year = {1999},
    Number = {2-3},
    Pages = {265--271},
    Volume = {419},
    __markedentry = {[User:6]},
    Abstract = {High quality single crystal Fe films to be used in spin polarized electron spectroscopy have been prepared in ultra-high vacuum by epitaxial growth on MgO(001) substrates. Oxygen absorption on the clean surface followed by annealing at 600°C produces a well-ordered p(1 x 1) overlayer. The low energy electron absorption and reflection from the Fe(001)-p(1 x 1)O surface display a huge dependence on the polarization of the primary beam. Peak values of the spin asymmetries of the absorbed (reflected) current larger than 13% (45%) around 4-8 eV electron kinetic energy are obtained. The presence of the surface oxide protects the system against contamination, so that an almost negligible asymmetry deterioration is observed after prolonged operation in vacuum. The results are discussed in view of applications in electron spin polarimetry. © 1999 Elsevier Science B.V. All rights reserved.},
    Address = {INFM, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Surface Science},
    Comment = {Cited By :1
    Export Date: 26 June 2015},
    Keywords = {Adatoms, Electron-solid interactions, Iron, Iron oxide, Magnetic measurements, Single crystal surfaces, Surface electronic phenomena},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0033521402&partnerID=40&md5=46b68f2d8508e9521bf673db98d15828}
    }
  • R. Bertacco and F. Ciccacci, "Fe/MgO (001) single-crystal films for electron polarimetry," , vol. 196, p. 134–135, 1999.
    [Bibtex]
    @Article{Bertacco1999a,
    Title = {Fe/MgO (001) single-crystal films for electron polarimetry},
    Author = {Bertacco, R. and Ciccacci, F.},
    Year = {1999},
    Pages = {134--135},
    Volume = {196},
    __markedentry = {[User:6]},
    Abstract = {Fe(001)-p(1--1)O surfaces, obtained by oxidation of Fe single-crystal films grown on MgO(001), hold potential for applications in electron spin polarimetry. The cleanliness of the Fe(001) initial surface is very critical point for the entire preparation of the film to used. The critical points in the surface preparation procedure, focusing on the relevance of starting with an oxygen-free, well-ordered Fe(001) film are discussed.},
    Address = {INFM-Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Journal of Magnetism and Magnetic Materials},
    Comment = {Cited By :5
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0032673120&partnerID=40&md5=2000e0a8b47c6d037729b2086c3fa37b}
    }
  • R. Bertacco and F. Ciccacci, "Oxygen-induced enhancement of the spin-dependent effects in electron spectroscopies of Fe(001)," , vol. 59, iss. 6, p. 4207–4210, 1999.
    [Bibtex]
    @Article{Bertacco1999d,
    Title = {Oxygen-induced enhancement of the spin-dependent effects in electron spectroscopies of Fe(001)},
    Author = {Bertacco, R. and Ciccacci, F.},
    Year = {1999},
    Number = {6},
    Pages = {4207--4210},
    Volume = {59},
    __markedentry = {[User:6]},
    Abstract = {Oxygen adsorption in an ordered p(1--1) fashion on the Fe(001) surface has been studied by empty states spectroscopies using a spin-polarized electron beam. The low-energy electron absorption and reflection display a much larger spin dependence in Fe(001)-p(1--1)O than in Fe(001). Peak values of the spin asymmetries of the absorbed (reflected) current larger than 13% (45%) at around 9-11 eV above the Fermi level are found. Spin-resolved inverse photoemission reveals that in the same energy range the exchange splitting between majority- and minority-spin states in Fe(001)-p(1--1)O is ∼50% larger than in the clean surface. © 1999 The American Physical Society.},
    Address = {INFM, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :49
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0000672730&partnerID=40&md5=feb6d7ae9c3a4dab8dbbeb04eeed9a14}
    }
  • R. Bertacco, L. Du, G. Isella, and F. Ciccacci, "Structural and magnetic properties of the Ce/Fe(001) interface: A spin resolved inverse photoemission study," , vol. 440, iss. 3, p. 301–306, 1999.
    [Bibtex]
    @Article{Bertacco1999c,
    Title = {Structural and magnetic properties of the Ce/Fe(001) interface: A spin resolved inverse photoemission study},
    Author = {Bertacco, R. and Du, L. and Isella, G. and Ciccacci, F.},
    Year = {1999},
    Number = {3},
    Pages = {301--306},
    Volume = {440},
    __markedentry = {[User:6]},
    Abstract = {We report a spin-resolved inverse photoemission study on the early stages of the Ce/Fe(001) interface formation in the coverage range 0-10 angstroms. The interface has been grown in two different fashions (i.e., keeping the substrate temperature either at room temperature or at approximately 600 °C), leading to quite different morphologic and magnetic properties. The room-temperature-grown interface shows the formation of a non-intermixed disordered Ce phase, giving rise to quite featureless spectra and to the absence of detectable spin-dependent effects. The hot-grown interface shows instead the formation of a stable and ordered Ce-Fe compound, with the clear appearance of new structures which show a sizeable spin-dependent behavior. A relevant Ce 4f contribution to them is ruled out on the basis of their angular dependence and of cross-section arguments, indicating their band-like character.},
    Address = {INFM, Dipartimento di Fisica, Politecnico di Milano, piazza L. da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Surface Science},
    Comment = {Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0033359780&partnerID=40&md5=2fd1262120b68182f403bc59dafe3fe3}
    }
  • R. Bertacco, D. Onofrio, and F. Ciccacci, "A novel electron spin-polarization detector with very large analyzing power," , vol. 70, iss. 9, p. 3572–3576, 1999.
    [Bibtex]
    @Article{Bertacco1999b,
    Title = {A novel electron spin-polarization detector with very large analyzing power},
    Author = {Bertacco, R. and Onofrio, D. and Ciccacci, F.},
    Year = {1999},
    Number = {9},
    Pages = {3572--3576},
    Volume = {70},
    __markedentry = {[User:6]},
    Abstract = {The low energy electron reflectivity from a magnetic surface depends on the relative orientation between the electron spin and the sample magnetization. This effect has been exploited for realizing a new electron spin polarization detector. As a scattering surface we have used a well ordered Fe(001)-p(1--1)O surface, which is stable against surface contamination and gives rise to very large spin dependent effects. We describe in detail the preparation in vacuum of such a target surface and show that it can be transferred in a separate system, without performance losses. The analyzing power S of the detector is given by the relative variation of its response when the target magnetization is reversed. We find extremely large S values for electrons reflected at 3-6 eV kinetic energy, with maximum above 45%, i.e., roughly 3 times better than other polarimeters presently used. © 1999 American Institute of Physics.},
    Address = {INFM, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Review of Scientific Instruments},
    Comment = {Cited By :16
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0000020267&partnerID=40&md5=a1f9d6abbe21e21f918367c35bfb67ff}
    }
  • F. Bisio, R. Moroni, M. Canepa, L. Mattera, R. Bertacco, and F. Ciccacci, "Structural versus Magnetic Properties at the Surface of Fe Films during Oxygen-Assisted Homoepitaxial Growth," , vol. 83, iss. 23, p. 4868–4871, 1999.
    [Bibtex]
    @Article{Bisio1999,
    Title = {Structural versus Magnetic Properties at the Surface of Fe Films during Oxygen-Assisted Homoepitaxial Growth},
    Author = {Bisio, F. and Moroni, R. and Canepa, M. and Mattera, L. and Bertacco, R. and Ciccacci, F.},
    Year = {1999},
    Number = {23},
    Pages = {4868--4871},
    Volume = {83},
    __markedentry = {[User:6]},
    Abstract = {The correlation between structural and magnetic properties at the surface of Fe films deposited on Fe(001)-p(1 -- 1)O has been investigated in real time during growth by He reflectivity (RHe). spin polarized metastable deexcitation spectroscopy (SPMDS), and spin resolved adsorbed curve spectroscopy (ACS). Surface oxygen acts as a surfactant for Fe growth as demonstrated by the well-resolved oscillations of RHe. The asymmetries measured both by SPMDS and ACS, sensitive to the spin polarization of occupied and unoccupied density of states, respectively, oscillate in phase with RHe. This demonstrates a strict correlation between morphology and the intensity of magnetization at surface.},
    Address = {INFM - Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Physical Review Letters},
    Comment = {Cited By :37
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0000604263&partnerID=40&md5=65fa697d979156406d685de53e0927bf}
    }

1998

  • R. Bertacco, "A versatile MBE apparatus for thin metal films deposition," , vol. 1998, iss. 9-10, p. 77–84, 1998.
    [Bibtex]
    @Article{Bertacco1998b,
    Title = {A versatile MBE apparatus for thin metal films deposition},
    Author = {Bertacco, R.},
    Year = {1998},
    Number = {9-10},
    Pages = {77--84},
    Volume = {1998},
    __markedentry = {[User:6]},
    Abstract = {An ultrahigh vacuum apparatus for thin metal films Molecular Beam Epitaxy (MBE) and characterization is presented. The chamber, equipped with six evaporation cells focused on the same position and another separated cell, allows to produce high purity, epitaxially grown thin films of pure elements and alloys. Their thickness ranges from fractions to some hundreds of nm, and they can be characterized in situ by Low Energy Electron Diffraction and Auger Electron Spectroscopy. As an application example of the entire apparatus the Fe/MgO(001) single crystal growth is also presented.},
    Address = {INFM, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Physics of Low-Dimensional Structures},
    Comment = {Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-3042913923&partnerID=40&md5=e3b12fff06970ac208e31b94722db014}
    }
  • R. Bertacco and F. Ciccacci, "Spin-resolved inverse photoemission from Pt/Fe(001)," , vol. 57, iss. 1, p. 96–99, 1998.
    [Bibtex]
    @Article{Bertacco1998,
    Title = {Spin-resolved inverse photoemission from Pt/Fe(001)},
    Author = {Bertacco, R. and Ciccacci, F.},
    Year = {1998},
    Number = {1},
    Pages = {96--99},
    Volume = {57},
    __markedentry = {[User:6]},
    Abstract = {The magnetic properties of unoccupied electronic states of Pt films grown on Fe(001) have been investigated by means of spin-resolved inverse photoemission. Interface and overlayer derived states are clearly identified, while their polarization dependence indicates a ferromagnetic coupling between Pt and Fe. The magnetic moment induced in the film remains, however, confined at the interface and polarization effects disappear above ∼5 Pt atomic layers. The persistence of interface derived states in thicker films points towards the formation of a nonabrupt interface.},
    Address = {INFM-Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Physical Review B - Condensed Matter and Materials Physics},
    Comment = {Cited By :15
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0242430823&partnerID=40&md5=3cbbc7848bf9f629f66d4d1a956e715b}
    }
  • R. Bertacco, S. De Rossi, and F. Ciccacci, "High-quality Fe(001) single crystal films on MgO(001) substrates for electron spectroscopies," , vol. 16, iss. 4, p. 2277–2280, 1998.
    [Bibtex]
    @Article{Bertacco1998a,
    Title = {High-quality Fe(001) single crystal films on MgO(001) substrates for electron spectroscopies},
    Author = {Bertacco, R. and De Rossi, S. and Ciccacci, F.},
    Year = {1998},
    Number = {4},
    Pages = {2277--2280},
    Volume = {16},
    __markedentry = {[User:6]},
    Abstract = {Fe films have been prepared in ultrahigh vacuum by epitaxial growth on MgO(001) substrates. Spin-resolved inverse photoemission measurements indicate that nonannealed overlayers display lower spectroscopic quality than the corresponding bulk system. Low energy electron diffraction and x-ray photoemission reveal that annealing promotes oxygen surface segregation giving rise to a c(2--2) reconstruction even in several hundred Å thick films. It is found that high-quality Fe(001) single crystal films with clean and well ordered surfaces can be obtained after high temperature annealing (∼600°C) of relatively thick films (>1000Å). © 1998 American Vacuum Society.},
    Address = {INFM-Dipartimento di Fisica, Politecnico di Milano, piazza Leonardo da Vinci 32, I-20133 Milano, Italy},
    Booktitle = {Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films},
    Comment = {Cited By :48
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0032357686&partnerID=40&md5=fcfbed6f068b1bbe3543bcc1e969d7d3}
    }
  • R. Bertacco, M. Merano, and F. Ciccacci, "Spin dependent electron absorption in Fe(001)-p(1x1)O: A new candidate for a stable and efficient electron polarization analyzer," , vol. 72, iss. 16, p. 2050–2052, 1998.
    [Bibtex]
    @Article{Bertacco1998c,
    Title = {Spin dependent electron absorption in Fe(001)-p(1x1)O: A new candidate for a stable and efficient electron polarization analyzer},
    Author = {Bertacco, R. and Merano, M. and Ciccacci, F.},
    Year = {1998},
    Number = {16},
    Pages = {2050--2052},
    Volume = {72},
    __markedentry = {[User:6]},
    Abstract = {The low energy electron absorption by a p(1--1) ordered oxygen overlayer on magnetized Fe(001) depends on the spin polarization of the primary beam. The peak value of the spin asymmetry is 12.5% at 6 eV electron kinetic energy, where the percentage absorption is 65%. The presence of the surface oxide prevents the system from contamination, so that an almost negligible asymmetry deterioration is observed after prolonged operation in vacuum. After exposure to atmosphere followed by heat-cleaning a peak value still larger than 7% is achieved. These results suggest spin dependent current absorption from Fe(001)-p(1--1)O as a very promising candidate for an efficient and extremely stable electron polarization analyzer. © 1998 American Institute of Physics.},
    Address = {INFM-Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Applied Physics Letters},
    Comment = {Cited By :39
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0000453462&partnerID=40&md5=d3fd9c971cde8fd5db654a03ae9b489d}
    }

1995

  • L. Du, P. Vavassori, and R. Bertacco, "Effects of Ce vs. Lu substitution on the electronic structure of rare earth-transition metal compounds," , vol. 225, iss. 1-2, p. 432–435, 1995.
    [Bibtex]
    @Article{DuA1995,
    Title = {Effects of Ce vs. Lu substitution on the electronic structure of rare earth-transition metal compounds},
    Author = {Du, L. and Vavassori, P. and Bertacco, R.},
    Year = {1995},
    Number = {1-2},
    Pages = {432--435},
    Volume = {225},
    __markedentry = {[User:6]},
    Abstract = {We report the results of a combined UV photoemission and inverse photoemission spectroscopy investigation of some isostructural rare earth (R) intermetallic compounds, i.e. CeCo2, LuCo2, CeRh2, LuRh2, Ce7Rh3 and Lu7Rh3, aiming to highlight the effects, on both the occupied and unoccupied d-derived partial density of states, of R substitution on different transition metal (M) hosts. These effects cannot be detected by X-ray spectroscopies because of the sizeable f-related contribution while, for cross-section reasons, UV spectroscopies may allow direct access to the d-like states. The results are discussed in terms of the different spatial extents of Ce and Lu 5d wavefunctions and of the degree of intermixing with the M partner d valence states. © 1995.},
    Address = {Dipartimento di Fisica, Politecnico di Milano, piazza Leonardo da Vinci 32, 20133 Milano, Italy},
    Booktitle = {Journal of Alloys and Compounds},
    Comment = {Export Date: 26 June 2015},
    Keywords = {Electronic structure, Photoelectron spectra, Photoemissions},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-58149321549&partnerID=40&md5=5e3a8231cce1baf76e50e95b879b08fd}
    }

1994

  • R. Bertacco, L. Du, P. Vavassori, and L. Braicovich, "High-efficiency photon detector for parallel acquisition of uv inverse photoemission spectroscopy," , vol. 5, iss. 8, p. 1015–1017, 1994.
    [Bibtex]
    @Article{Bertacco1994,
    Title = {High-efficiency photon detector for parallel acquisition of uv inverse photoemission spectroscopy},
    Author = {Bertacco, R. and Du, L. and Vavassori, P. and Braicovich, L.},
    Year = {1994},
    Number = {8},
    Pages = {1015--1017},
    Volume = {5},
    __markedentry = {[User:6]},
    Abstract = {We describe an ultraviolet photon detector realized for parallel acquisition of eight inverse photoemission spectra in the isochromatic mode, at photon energies from 10 to 25 eV. This simple and reliable device is obtained by combining an array of eight channeltrons (corresponding to the various photon energies of the spectra) and a single Csl-coated photocathode.},
    Address = {Politecnico di Milano, Milano, Italy},
    Booktitle = {Measurement Science and Technology},
    Comment = {Cited By :5
    Export Date: 26 June 2015},
    Owner = {User},
    Timestamp = {2015.06.26},
    Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0028485507&partnerID=40&md5=f7b72fd8078c4b5286a47ca712e7f288}
    }