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  1. No Access

    Article

    Oscillatory Angular Dependence of Exchange Bias for Epitaxial NiO−Co (001) Bilayers

    We have sputter-deposited NiO-Co bilayers on MgO (001) substrates. NiO grows epitaxially on MgO at 900°C and subsequently the room deposited 80 Åthick Co films have a fcc crystal structure in epitaxy with the ...

    S. Dubourg, J. F. Bobo, B. Warot, E. Snoeck, J. C. Ousset in MRS Online Proceedings Library (2011)

  2. No Access

    Article

    Exchange-Biased Nio−Co Nanofaceted Bilayers Grown on MgO (110)

    We have sputter-grown self-organised faceted NiO-Co epitaxial bilayers on MgO(110). Due to very close lattice parameters, NiO adopts the same NaCl crystallographic structure as the substrate but it minimises i...

    S. Dubourg, J. F. Bobo, B. Warot, E. Snoeck, J. C. Ousset in MRS Online Proceedings Library (2011)

  3. No Access

    Article

    Epitaxial NiO-Co exchange-biased bilayers grown on MgO single crystals Influence of the substrate orientation on the film morphology, the Co structure and the magnetic behavior

    Co/NiO bilayers have been grown on MgO(001), MgO(110) and MgO(111) substrates in an ultra high vacuum sputtering chamber. Growth mode and surface morphology are investigated by X-ray diffraction, Reflection Hi...

    B. Warot, E. Snoeck, J. C. Ousset, M. J. Casanove… in MRS Online Proceedings Library (2011)

  4. No Access

    Article

    Magneto-Resistance and Induced Domain Structure in Tunnel Junctions

    Magnetization reversals in sputtered Co electrodes of a magnetic tunnel junction are studied using transport measurements, magneto-optic Kerr magnetometry and microscopy. Using the tunnel magneto-resistive eff...

    M. Hehn, O. Lenoble, D. Lacour, A. Schuhl, C. Tiusan… in MRS Online Proceedings Library (2011)

  5. No Access

    Article

    Specular and Off-Specular X-Ray Scattering as Quantitative Structural Probes of Multilayers. Application to MN/IR(111) Superlattices

    Diffuse scattering of X rays is a particularly useful tool for studying interface and surface defects in single layer films. We have extended this technique to the study of multilayers. The samples are Mn/Ir(1...

    H. M. Fischer, H. E. Fischer, M. Bessiere, J.-F. Bobo… in MRS Online Proceedings Library (2011)

  6. No Access

    Article

    \(\mbox{\sffamily\bfseries NiFe}_{\hbox{\sffamily\bfseries\fontsize{12}{12}\selectfont 2}}\mbox{\sffamily\bfseries O}_{\hbox{\sffamily\bfseries\fontsize{12}{12}\selectfont 4}}\) and \(\mbox{\sffamily\bfseries Fe}_{\hbox{\sffamily\bfseries\fontsize{12}{12}\selectfont 3}}\mbox{\sffamily\bfseries O}_{\hbox{\sffamily\bfseries\fontsize{12}{12}\selectfont 4}}\) studied by XMCD and resonant photoemission

    X-ray magnetic circular dichroism and resonant photoemission at the Fe and Ni L2,3 edges have been used to investigate the electronic structure of NiFe2O4 (NFO) thin films. The results, when compared to those obt...

    M. C. Richter, J.-M. Mariot, O. Heckmann… in The European Physical Journal Special Topi… (2009)

  7. No Access

    Article

    Complex angular dependence of exchange bias on (001) epitaxial NiO-Co bilayers

    We have sputter-deposited NiO-Co bilayers on MgO(001) substrates. NiO and Co grow epitaxially on MgO and reproduce its fcc structure. The high quality of our samples, in terms of flatness and crystallographic ...

    S. Dubourg, J. F. Bobo, B. Warot, E. Snoeck… in The European Physical Journal B - Condense… (2005)

  8. No Access

    Article

    Exchange anisotropy in Co/NiO bilayers: time-dependent effects

    The time dependence of the exchange anisotropy was studied in Co/NiO bilayers. In order to only observe the relaxation phenomena inside the antiferromagnetic (AF) layer and to eliminate the dynamic behaviour i...

    D. Hrabovský, B. Diouf, L. Gabillet… in The European Physical Journal B - Condense… (2005)

  9. No Access

    Article

    Tuning the growth orientation of NiFe2O4 films by appropriate underlayer selection

    We have grown NiFe2O4 thin films on (001)-oriented SrTiO3 and (001)-oriented Pt underlayers. Although these two templates present a similar lattice mismatch with NiFe2O4 (about -6%), the ferrite grows cube-on-cu...

    U. Lüders, M. Bibes, J.F. Bobo, J. Fontcuberta in Applied Physics A (2005)

  10. No Access

    Article

    Magnetic behavior and role of the antiphase boundaries in Fe3O4 epitaxial films sputtered on MgO (001)

    Magnetite Fe3O4 films were grown on single crystal MgO (001) substrates using facing target sputtering technique. Conversion Electron Mössbauer Spectroscopy and magneto optical polar Kerr spectra have confirmed t...

    J.F. Bobo, D. Basso, E. Snoeck, C. Gatel… in The European Physical Journal B - Condense… (2001)

  11. No Access

    Article

    Growth and Characterization of Epitaxial NiMnSb/PtMnSb C1b Heusler alloy superlattices

    We have sputter deposited NiMnSb/PtMnSb Heusler alloy superlattices with bilayer periods from 9–160 Å. X-ray diffraction and cross-sectional transmission electron microscopy (TEM) measurements indicate that ev...

    F. B. Mancoff, J. F. Bobo, O. E. Richter, K. Bessho… in Journal of Materials Research (1999)

  12. No Access

    Article

    Structural and Magnetic Properties of XMnSb/PtMnSb Clb Heusler Alloy Superlattices (X=Ni,Cu)

    We have grown superlattices based on the Clb Heusler alloys PtMnSb, CuMnSb and NiMnSb between 200-500/dgC on A12O3 (0001). X-ray diffraction (XRD) indicates (111) oriented ordered structures for growth at 300/dgC...

    J. F. Bobo, K. Bessho, F. B. Mancoff, P. R. Johnson… in MRS Online Proceedings Library (1997)

  13. No Access

    Article

    Stability of Nitrogen in Sputtered Iron Nitride thin films and Multilayers

    Different phases of FeN thin films and Fe/FeN multilayers were prepared by reactive rf sputtering. The release of nitrogen and the crystallographic transformations during annealing were monitored by thermal de...

    H. Chatbi, M. Vergnat, J. F. Bobo, L. Hennet in MRS Online Proceedings Library (1997)

  14. No Access

    Article

    Structural Transformations During Growth of Epitaxial Fe(001) Thin Films on Cu(001) and Pt(001)

    We have used grazing incidence x-ray diffraction to observe the structural evolution during growth of sputter-deposited epitaxial Fe films on Cu(001) and Pt(001). We find that on Cu(001), Fe is fcc up to a thi...

    B. M. Clemens, T. C. Hufnagel, M. C. Kautzky, J.-F. Bobo in MRS Online Proceedings Library (1996)

  15. No Access

    Article

    Structural properties and thermal stability of Fe/Al2O3 multilayers

    Iron/alumina multilayers have been deposited on sapphire wafers using RF magnetron sputtering. To study the interdiffusion, the multilayers were annealed in a tubular furnace under a 10−7 mbar vacuum, and the sam...

    O. Lenoble, J. F. Bobo, H. Fischer, Ph. Bauer, M. F. Ravet… in Journal of Materials Research (1995)

  16. No Access

    Article

    Magnetic and Structural Properties of Iron Nitride thin Films Obtained by Argon-Nitrogen Reactive Radio-Frequency Sputtering

    Fe-N thin films have attracted considerable attention because they are potential candidates for magnetic recording with their large saturation magnetization and their good corrosion resistance1. It has even been ...

    H. Chatbi, J.F. Bobo, M. Vergnat, L. Hennet, J. Ghanbaja… in MRS Online Proceedings Library (1995)

  17. No Access

    Article

    Effect of Ion Irradiation on the Artificial Structure and the Interlayer Coupling of Copper-Cobalt Multilayers

    Structural defects like local ferromagnetic short-circuits are responsible for large reductions of the intrinsic interlayer coupling in the case of antiferromagnetically (AF) coupled multilayers (ML). We have ...

    J. F. Bobo, E. Snoeck, M. Piecuch, M. J. Casanove in MRS Online Proceedings Library (1994)

  18. No Access

    Article

    Modification of Magnetic Coupling in Antiferromagnetically Coupled Bilayers Due to the Existence of Ferromagnetic Pin Holes.

    We have calculated numerical simulations and analytical solutions of the influence of a pin hole on the magnetization curves of multilayer systems. The magnetization curves we obtained can be described by a bi...

    J.F. Bobo, H. Fischer, M. Piecuch in MRS Online Proceedings Library (1993)

  19. No Access

    Article

    Evidence for Spin Polarization of Metallic Copper in Co/Cu and Fe/Cu Multilayers

    Magnetic circular x-ray dichroism measurements on Co/Cu and Fe/Cu multilayers at the K edge of copper show that the 4p-states of copper are significantly spin-polarized by the adjacent magnetic layers. In relatio...

    S. Pizzini, C. Giorgetti, A. Fontaine, E. Dartyge… in MRS Online Proceedings Library (1993)

  20. No Access

    Article

    Magnetic Properties of Fe/Ru and Fe/Ir Superlattices with Short Periodicity

    We present new results on the magnetic properties of constrained, iron base, good quality, single-crystalline superlattices, Fe/Ru and Fe/Ir. It is shown that in the first case there are two magnetically dead ...

    M. Piecuch, S. Andrieu, J. F. Bobo, M. Maurer… in MRS Online Proceedings Library (1991)