Ferrimagnetic τ-MnAl/Co superlattices on GaAs

被引：24

作者：

Lauhoff, G

Bruynseraede, C

de Boeck, J

van Roy, W

Bland, JAC

Borghs, G

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] IMEC, B-3001 Louvain, Belgium

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.79.5290

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the ferrimagnetic superlattice ordering in epitaxial tau-MnAl/Co superlattices on GaAs. For ultrathin Co layers (3.5-7 Angstrom), both the ferromagnetic tau MnAl and Co layers display a large perpendicular magnetic anisotropy together with an antiferromagnetic interface exchange coupling. As a result, an abrupt transition from the ferromagnetically aligned state at saturation to a ferrimagnetic superlattice ordering occurs at unusually high fields (3-7 T) followed by a reversal of the total sample moment at low fields (0.3-1.6 T).

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页码：5290 / 5293

页数：4

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