Modeling exchange bias microscopically

Details Modeling exchange bias microscopically Modeling exchange bias microscopically

2002-03-14

arxiv.org/abs/cond-mat/0203297v2

Physics

Condensed Matter

Materials Science

7 pages, 5 figures

Scientific paper

10.1016/S0304-8853(01)00813-7

Exchange bias is a horizontal shift of the hysteresis loop observed for a ferromagnetic layer in contact with an antiferromagnetic layer. Since exchange bias is related to the spin structure of the antiferromagnet, for its fundamental understanding a detailed knowledge of the physics of the antiferromagnetic layer is inevitable. A model is investigated where domains are formed in the volume of the AFM stabilized by dilution. These domains become frozen during the initial cooling procedure carrying a remanent net magnetization which causes and controls exchange bias. Varying the anisotropy of the antiferromagnet we find a nontrivial dependence of the exchange bias on the anisotropy of the antiferromagnet.

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