Magnetic domain structure and magnetic anisotropy in Ga1-xMnxAs -: art. no. 167206

被引：261

作者：

Welp, U

Vlasko-Vlasov, VK

Liu, X

Furdyna, JK

Wojtowicz, T

机构：

[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[2] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[3] PAS, Inst Phys, Warsaw, Poland

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.90.167206

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Large, well-defined magnetic domains, on the scale of hundreds of micrometers, are observed in Ga1-xMnxAs epilayers using a high-resolution magneto-optical imaging technique. The orientations of the magnetic moments in the domains clearly show in-plane magnetic anisotropy, which changes through a second-order transition from a biaxial mode (easy axes nearly along [100] and [010]) at low temperatures to an unusual uniaxial mode (easy axis along [110]) as the temperature increases above about T-c/2. This transition is a result of the interplay between the natural cubic anisotropy of the GaMnAs zinc-blende structure and a uniaxial anisotropy which attribute to the effects of surface reconstruction.

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页数：4

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