STRONG MAGNETIC-X-RAY DICHROISM IN 2P ABSORPTION-SPECTRA OF 3D TRANSITION-METAL IONS

被引:409
作者
VANDERLAAN, G [1 ]
THOLE, BT [1 ]
机构
[1] STATE UNIV GRONINGEN, CTR MAT SCI, 9747 AG GRONINGEN, NETHERLANDS
关键词
D O I
10.1103/PhysRevB.43.13401
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
From atomic calculations in crystal-field symmetry we find a very strong circular and linear dichroism in the 2p x-ray absorption edges of magnetically ordered 3d transition-metal ions. The spectral shape changes drastically with the character of the ground state, which is determined by the presence of a crystal field, and the relative magnitudes of the exchange and 3d spin-orbit interaction. The difference in integrated intensity of the 2p absorption for left- and right-circular polarization provides a measure for the 3d spin-orbit coupling in spherical and crystal-field symmetry. The anisotropic branching ratio depends on the spin-orbit interaction and the Van Vleck contribution of the exchange interaction. The results of our calculations provide a basis for the study of magnetic x-ray dichroism on materials with localized 3d electrons.
引用
收藏
页码:13401 / 13411
页数:11
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