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Influence of thermal energy on exchange-bias studied by finite-element simulations

  • J. Dean*
  • , A. Kohn
  • , A. Kovács
  • , D. A. Allwood
  • , D. Suess
  • , T. Schrefl
  • *Corresponding author for this work
  • University of Sheffield
  • Ben-Gurion University of the Negev
  • Jülich Research Centre
  • TU Wien
  • St. Poelten University of Applied Sciences

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

In this article we describe the thermal relaxation in anti-ferromagnetic/ ferromagnetic bilayers using a hybrid method that combines a kinetic Monte Carlo technique with magnetization dynamics following the Landau Lifshitz Gilbert equation. A granular anti-ferromagnetic layer is exchange coupled to an amorphous ferromagnetic layer and discretized using a finite element method. Calculations are made to help clarify how the underlying magnetic structure is related to the measured exchange bias fields as a function of temperature for the case of amorphous Co65.5Fe14.5B20/granular Ir22Mn78 bilayers. Our calculations are in excellent agreement with experimentally measured macro-magnetic properties of these bilayers.

Original languageEnglish
Article number042410
JournalApplied Physics Letters
Volume103
Issue number4
DOIs
StatePublished - 22 Jul 2013
Externally publishedYes

Funding

FundersFunder number
Engineering and Physical Sciences Research CouncilEP/F016174/1

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