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

Research output: Contribution to journalArticlepeer-review

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

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