THEORETICAL-STUDY OF THE X-RAY DICHROISM OF 5D-IMPURITY ATOMS DISSOLVED IN FERROMAGNETIC FE

被引:8
作者
EBERT, H [1 ]
ZELLER, R [1 ]
机构
[1] FORSCHUNGSZENTRUM JULICH, INST FESTKORPERPHYS, D-5170 JULICH 1, FED REP GER
关键词
Electronic Properties - Spectroscopy; Absorption; -; Spectroscopy; X-ray;
D O I
10.1016/0921-4526(89)90132-4
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Recent measurements of the X-ray absorption at the L-edges of 5d-impurity atoms dissolved in ferromagnetic Fe resulted in a very pronounced dependence of the corresponding absorption spectra on the helicity of the radiation. Because the physical origin of this X-ray dichroism is the subtle interplay of spin-polarization and spin-orbit coupling, a satisfying description of the phenomenon has to treat spin-magnetism and relativistic effects on the same level. The spin-polarized relativistic Korringa-Kohn-Rostoker-Green's function method of band structure calculation provides a very sound, parameter-free basis for such a description. We have adopted this approach to calculate the electronic structure and from this the absorption spectra of 5d-impurities dissolved in ferromagnetic Fe. The results of our calculations are in very satisfying agreement with experiment and permit a detailed discussion of the observed spectra and their dependence on the polarization of the X-ray radiation. © 1989.
引用
收藏
页码:191 / 194
页数:4
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