Effect of spin current on uniform ferromagnetism: Domain nucleation

被引：73

作者：

Shibata, J

Tatara, G

Kohno, H

机构：

[1] RIKEN, Inst Phys & Chem Res, Frontier Res Syst, Wako, Saitama 3510198, Japan

[2] JST, CREST, Kawaguchi, Saitama 3320012, Japan

[3] JST, PRESTO, Kawaguchi, Saitama 3320012, Japan

[4] Osaka Univ, Grad Sch Sci, Toyonaka, Osaka 5600043, Japan

[5] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.94.076601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A large spin current applied to a uniform ferromagnet leads to a spin-wave instability as pointed out recently. In this Letter, it is shown that such spin-wave instability is absent in a state containing a domain wall, which indicates that nucleation of magnetic domains occurs above a certain critical spin current. This scenario is supported also by an explicit energy comparison of the two states under spin current.

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页数：4

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