SPIN-DEPENDENT EXAFS IN PURE METALS AND GARNETS

被引：26

作者：

KNULLE, M ^{[1
]}

AHLERS, D ^{[1
]}

SCHUTZ, G ^{[1
]}

机构：

[1] UNIV AUGSBURG,INST PHYS,D-86135 AUGSBURG,GERMANY

来源：

SOLID STATE COMMUNICATIONS | 1995年 / 94卷 / 04期

关键词：

MAGNETICALLY ORDERED MATERIALS; EXAFS; SPIN DYNAMICS; X-RAY SPECTROSCOPY;

D O I：

10.1016/0038-1098(95)00056-9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Magnetic EXAFS are studied using circularly polarized synchrotron radiation in the energy range of 6000-9000 eV at the L-edges of pure Gd metal, the L(2,3)-edges of Eu in Eu3Fe5O12 and the K-edges of Fe, Co and Ni metal. On the basis of a two-step model the dichroic absorption effects are described in terms of an additive contribution to the backscattering amplitude caused by the exchange interaction, which is directly correlated to the spin-moment of the neighboring atom. The damped low-frequent background found in the dichroic L(2,3)-spectra of Gd and Tb metal is interpreted as an atomic x-ray fine structure of strong magnetic character.

引用

页码：267 / 273

页数：7

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