Influence of the different strains' components on the uniaxial magnetic anisotropy parameters for a (Ga,Mn)As bulk system: A first-principles study

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:432

Article

Birowska, M.¹ 

[1] Univ Warsaw, Fac Phys, Inst Theoret Phys, Ul Pasteura 5, PL-02093 Warsaw, Poland

关键词: Ab initio calculations;    Dilute magnetic semiconductors;    Gallium arsenide;    Magnetic anisotropy;    Density functional theory;    Spintronics;   

DOI  :  10.1016/j.jmmm.2017.01.102

来源: Elsevier

【 摘 要 】

We present a computational study of the magnetic anisotropy energy for a given concentration of the Mn-ions in the GaAs host, in the framework of the density functional theory. We focus on the influence of a different kind of strains: biaxial, shear, and hydrostatic on the uniaxial magnetic anisotropy parameters K-1 and K-2, which reflect the magnetic anisotropy energy out- and in- (001) plane, respectively. We have shown that the general trends for the applied biaxial strain on anisotropy parameters are consistent with the experimental data. We have predicted the critical strains, for which the magnetization vector changes its direction. Our results have shown that it is not possible to modify considerably the uniaxial magnetic anisotropy parameters, exposing (Ga,Mn)As to hydrostatic pressure of a magnitude reasonable from experimental point of view. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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