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

  • S. Dubourg
  • J. F. BoboEmail author
  • B. Warot
  • E. Snoeck
  • J. C. Ousset
Epitaxial systems

Abstract.

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 coherence of the interface, allows the observation of an additional fourfold magnetic anisotropy term by standard magnetometry. This term is induced by interfacial interaction assigned to the same origin as exchange bias. Additional measurements of exchange bias azimuthal dependence versus the crystallographic axes of the film plane reveal unusual behaviors with several sign changes related to this fourfold anisotropy.

Keywords

Spectroscopy Neural Network Anisotropy Coherence Complex System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Authors and Affiliations

  • S. Dubourg
    • 1
  • J. F. Bobo
    • 1
    Email author
  • B. Warot
    • 2
  • E. Snoeck
    • 2
  • J. C. Ousset
    • 2
  1. 1.LNMH-CNRS, ONERA, 2 avenue Edouard BelinToulouseFrance
  2. 2.CEMES CNRS, 29 rue Jeanne MarvigToulouseFrance

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