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Magnetization reversal in perpendicular exchange-biased multilayers

Author

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  • J. Moritz
  • S. van Dijken
  • J. M.D. Coey

Abstract

Co/Pt multilayers with perpendicular magnetic anisotropy exhibit an exchange bias when covered with an IrMn layer. The exchange bias field, which is about 7 mT for 3 Co/Pt bilayer repetitions and a Co layer thickness of 5 Å, can be increased up to 16.5 mT by the insertion of a thin Pt layer at the Co/IrMn interface. The interfacial magnetic anisotropy of the Co/IrMn interface (KSCo/IrMn =-0.09 mJ/m2) favours in-plane magnetization and tends to tilt the Co spins away from the film normal. Dynamical measurements of the magnetization reversal process reveal that both thermally activated spin reversal in the IrMn layer and domain wall nucleation in the Co/Pt multilayer influence the interfacial spin structure and therefore the strength of the perpendicular exchange bias field. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Suggested Citation

  • J. Moritz & S. van Dijken & J. M.D. Coey, 2005. "Magnetization reversal in perpendicular exchange-biased multilayers," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 45(2), pages 191-195, May.
    • Handle: RePEc:spr:eurphb:v:45:y:2005:i:2:p:191-195
    DOI: 10.1140/epjb/e2005-00182-7
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