X-ray magnetic circular dichroism at the K edge of Mn3GaC -: art. no. 245104

被引：23
|
作者：
Takahashi, M [1 ]
Igarashi, J
机构：
[1] Gunma Univ, Fac Engn, Gunma 3768515, Japan
[2] Japan Atom Energy Res Inst, Synchrotron Radiat Res Ctr, Sayo, Hyogo 6795148, Japan
来源：
PHYSICAL REVIEW B | 2003年 / 67卷 / 24期
关键词：
D O I：
10.1103/PhysRevB.67.245104
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We theoretically investigate the origin of the x-ray magnetic circular dichroism (XMCD) spectra at the K edges of Mn and Ga in the ferromagnetic phase of Mn3GaC on the basis of an ab initio calculation. Taking account of the spin-orbit interaction in the local density approximation scheme, we obtain the XMCD spectra in excellent agreement with the recent experiment. We have analyzed the origin of each structure, and thus elucidated the mechanism for inducing the orbital polarization in the p symmetric states. We also discuss a simple sum rule connecting the XMCD spectra with the orbital moment in the p symmetric states.
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页数：5
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