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Effects of nonmagnetic metal additives in metallic antiferromagnets on exchange bias | | Marian Fecioru-Morariu
; Syed Rizwan Ali
; Cristian Papusoi
; Martin Sperlich
; Gernot Guentherodt
; | | Date: |
8 Jan 2007 | | Subject: | Materials Science | | Abstract: | The effect of nonmagnetic metal additives in metallic antiferromagnets (AFMs) on the exchange bias (EB) has been investigated from a structural, magnetic and Monte Carlo simulation point of view in bilayers of CoFe/IrMn:Cu. Dilution by Cu atoms throughout the volume of the AFM IrMn give rise to an enhanced EB field for temperatures between 5 K and 300 K. The thermoremanent magnetization of the AFM-only is also enhanced with dilution, shows qualitatively the same temperature dependence as EB field and is at the origin of the EB mechanism. Monte Carlo simulations based on a Heisenberg model and temperature dependent uncompensated AFM moments confirm well the experimental results. | | Source: | arXiv, cond-mat/0701155 | | Services: | Forum | Review | PDF | Favorites | |
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