Magnetic moments at the surface of antiferromagnetic NiO(100)

被引：116

作者：

Hillebrecht, FU

Ohldag, H

Weber, NB

Bethke, C

Mick, U

Weiss, M

Bahrdt, J

机构：

[1] Univ Dusseldorf, Inst Angew Phys, D-40225 Dusseldorf, Germany

[2] BESSY, D-12489 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.86.3419

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The orientation of magnetic moments at the (100) surface of antiferromagnetic NiO single crystals is studied by x-ray linear magnetic dichroism in photoemission microscopy. T domains are observed terminating at the surface, with domain boundaries running mostly along in-plane [10] directions. From the detailed polarization dependence we find that the magnetic surface structure of a cleaved crystal is bulk terminated. This is in contrast to sputtered surfaces, where magnetic moments lie within the surface plane, forming a magnetically relaxed structure. These findings are of importance for understanding the exchange bias phenomenon.

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页码：3419 / 3422

页数：4

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