X-ray absorption spectroscopy and magnetic circular x-ray dichroism in Ce2Fe17N3

被引：20

作者：

Isnard, O ^{[1
]}

Miraglia, S ^{[1
]}

Fruchart, D ^{[1
]}

Giorgetti, C ^{[1
]}

Dartyge, E ^{[1
]}

Krill, G ^{[1
]}

机构：

[1] UNIV PARIS 11, LAB UTILISAT RAYONNEMENT ELECTROMAGNET, F-91405 ORSAY, FRANCE

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1996年 / 8卷 / 14期

关键词：

D O I：

10.1088/0953-8984/8/14/017

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The effect of nitrogen insertion on the electronic properties of cerium and iron in Ce2Fe17 has been studied by means of x-ray absorption spectroscopy (XAS) and magnetic circular x-ray dichroism (MCXD). The evolution of the electronic structure of cerium upon nitrogen insertion has been studied. It emerges from this MCXD study at the L(2.3) edges of cerium that the cerium atoms bear a 5d magnetic moment of about 0.4 mu beta that is coupled antiferromagnetically to that of iron. The spin polarized EXAFS signal has been observed; an attempt to evidence the magnetic environment has been made in the light of previous neutron diffraction results. Comparison of EXAFS and spin polarized EXAFS is revealed to be an efficient new tool to distinguish between magnetic and non-magnetic atoms in the environment of the absorber. The analysis of the Fe K edge MCXD spectra shows that insertion of nitrogen induces a trend to strong ferromagnetism with an almost completely filled majority spin subband.

引用

页码：2437 / 2446

页数：10

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