AN INVESTIGATION OF URANIUM M(4,5) EDGE MAGNETIC-X-RAY CIRCULAR-DICHROISM IN US

被引：69

作者：

COLLINS, SP

LAUNDY, D

TANG, CC

VANDERLAAN, G

机构：

[1] Dept. of Synchrotron Radiat., CCLRC Daresbury Lab., Warrington

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1995年 / 7卷 / 48期

关键词：

D O I：

10.1088/0953-8984/7/48/021

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Magnetic x-ray circular dichroism (MXCD) has been measured in a ferromagnetic uranium monosulphide crystal by monitoring the fluorescence signal over the uranium M(4,5) edges. Despite sizeable absorption corrections, we have obtained a precise value of the dichroic branching ratio, which is compared with sum-rule predictions. We find that, in contrast to the case of cubic 3d transition metals where the magnetic dipole term (T-z) can be neglected, its contribution to the dichroism signal in the present case is larger than that of the spin polarization, (S-z). The dichroism spectrum is shown to exhibit considerably more structure than those of resonant magnetic diffraction from antiferromagnetic actinide compounds, and is found to be in good qualitative agreement with atomic calculations of 5f(2) and 5f(3) configurations.

引用

页码：9325 / 9341

页数：17

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