Anisotropy of crystalline ferromagnets with defects

被引：0

作者：

Cullen, J. ^{[1
]}

Zhao, P. ^{[1
]}

Wuttig, M. ^{[1
]}

机构：

[1] Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, United States

来源：

Journal of Applied Physics | 2007年 / 101卷 / 12期

关键词：

This letter describes a model of the anisotropy of crystalline ferromagnetic alloys containing defect clusters. The focus is on 〈100〉-type pairs in bcc lattices each of which is assigned a uniaxial anisotropy of fixed magnitude. The lattice is also characterized by a coherent anisotropy energy due to the transition element host lattice as well as an isotropic exchange and magnetic dipole energy. This model is applied to a study of the concentration dependence of the fourfold magnetic anisotropy Keff (C) of quenched bcc Fe1-C GaC alloys. It yields Keff (C) 1-κ C4 which gives a good account of the dependence of Keff on C. In particular; it accounts for the collapse of Keff at C0.2; provided the magnitude of the local anisotropy energy is three orders of magnitude larger than that of the coherent fourfold anisotropy energy. © 2007 American Institute of Physics;

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摘要：

Journal article (JA)

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