Resonant x-ray scattering studies of the magnetic structure near the surface of an antiferromagnet

被引：22

作者：

Watson, GM ^{[1
]}

Gibbs, D

Lander, GH

Gaulin, BD

Berman, LE

Matzke, H

Ellis, W

机构：

[1] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA

[2] Brookhaven Natl Lab, Dept Phys, Natl Synchrotron Light Source, Upton, NY 11973 USA

[3] Commiss European Communities, Joint Res Ctr, Inst Transuranium Elements, D-76125 Karlsruhe, Germany

[4] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada

[5] Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.61.8966

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Resonant x-ray magnetic scattering is used to study magnetic order near the (001) surface of the antiferromagnetic oxide UO2 for temperatures between 10 and 35 K. It is found that for temperatures below the bulk Neel temperature a magnetically disordered region exists at the surface, and is separated from the magnetically ordered bulk by a diffuse magnetic interface. The width of the magnetic interface is temperature dependent, and appears to diverge as the sample temperature approaches the bulk Neel temperature. In contrast to the bulk, which exhibits a discontinuous magnetic ordering transition, the surface layers order continuously. These results are shown to be qualitatively consistent with the theory of surface induced disorder.

引用

页码：8966 / 8975

页数：10

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