Giant anisotropy in x-ray magnetic linear dichroism in (Ga,Mn)As

被引：24
|
作者：
Freeman, A. A. [1 ]
Edmonds, K. W.
van der Laan, G.
Farley, N. R. S.
Johal, T. K.
Arenholz, E.
Campion, R. P.
Foxon, C. T.
Gallagher, B. L.
机构：
[1] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England
[2] Daresbury Lab, CCLRC, Warrington WA4 4AD, Cheshire, England
[3] Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA
来源：
PHYSICAL REVIEW B | 2006年 / 73卷 / 23期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1103/PhysRevB.73.233303
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hugely anisotropic Mn L-2,L-3 x-ray magnetic linear dichroism (XMLD) is reported for the ferromagnetic semiconductor (Ga,Mn)As. The sign, magnitude, and line shape of the dichroism changes with azimuthal rotation of the samples between the in-plane < 110 > and < 100 > directions. The strong anisotropy is confirmed by multiplet calculations for a Mn 3d(5) configuration where charge anisotropy and magnetocrystalline anisotropy are absent. This allows a precise determination of the Mn 3d crystal-field splitting, and establishes the anisotropy in the XMLD as a general feature for localized moment systems with crystal-field symmetry.
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页数：4
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