Asymmetric-magnetization reversal in exchange-biased polycrystalline F/AF bilayers

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:262

Article

Spenato, D ; Pogossian, SP ; Le Gall, H

关键词: exchange bias;    thin magnetic films;    magnetization reversal;   

DOI  :  10.1016/S0304-8853(02)01524-X

来源: Elsevier

【 摘 要 】

This paper describes a model for magnetization reversal in polycrystalline ferromagnetic (F)/antiferromagnetic (AF) exchange-biased bilayers. We assume that the exchange energy can be expanded into cosine power series. We show that it is,possible to fit experimental asymmetric shape of hysteresis loops in exchange-biased bilayer for any direction of the applied field. The, hysteresis asymmetry is discussed in terms of energy considerations. An angle beta is introduced to quantify the easy axis dispersion of AF grains. (C) 2002 Elsevier Science B.V. All rights reserved.

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