Current-induced spin-wave excitations in a single ferromagnetic layer

被引：113

作者：

Ji, Y ^{[1
]}

Chien, CL

Stiles, MD

机构：

[1] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[2] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 10期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.90.106601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Evidence for a current-induced spin-transfer torque effect has been investigated in a series of point contacts to single ferromagnetic layers. At specific current densities, abrupt resistance changes, similar to those attributed to current-induced spin-wave excitations in multilayers, have been observed for one current polarity. The critical current for these resistance changes depends linearly on the external field applied perpendicular to the layer. The observed effect is interpreted as a current-driven heterogeneous instability in an otherwise uniform ferromagnetic layer.

引用

页数：4

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