Current-Induced Control of Spin-Wave Attenuation

被引：102

作者：

Seo, Soo-Man ^{[1
]}

Lee, Kyung-Jin ^{[1
]}

Yang, Hyunsoo ^{[2
]}

Ono, Teruo ^{[3
]}

机构：

[1] Korea Univ, Dept Mat Sci & Engn, Seoul 136701, South Korea

[2] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore, Singapore

[3] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 14期

关键词：

DOMAIN-WALL MOTION; POLARIZED CURRENT; DRIVEN; EXCITATION;

D O I：

10.1103/PhysRevLett.102.147202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The current-induced modification of the attenuation of a propagating spin wave in a magnetic nanowire is studied theoretically and numerically. The attenuation length of spin wave can increase when the spin waves and electrons move in the same direction. It is directly affected by the nonadiabaticity of the spin-transfer torque and thus can be used to estimate the nonadiabaticity. When the nonadiabatic spin torque is sufficiently large, the attenuation length becomes negative, resulting in the amplification of spin waves.

引用

页数：4

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