Scattering theory of charge-current-induced magnetization dynamics

被引：57

作者：

Hals, K. M. D. ^{[1
]}

Brataas, A. ^{[1
]}

Tserkovnyak, Y. ^{[2
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Phys, NO-7491 Trondheim, Norway

[2] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

来源：

EPL | 2010年 / 90卷 / 04期

关键词：

SEMICONDUCTORS;

D O I：

10.1209/0295-5075/90/47002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In ferromagnets, charge currents can excite magnons via the spin-orbit coupling. We develop a novel and general scattering theory of charge-current-induced macrospin magnetization torques in normal metal vertical bar ferromagnet vertical bar normal metal layers. We apply the formalism to a dirty GaAs vertical bar(Ga, Mn)As vertical bar GaAs system. By computing the charge-current-induced magnetization torques and solving the Landau-Lifshitz-Gilbert equation, we find magnetization switching for current densities as low as 5 x 10(6) A/cm(2). Our results are in agreement with a recent experimental observation of charge-current-induced magnetization switching in (Ga, Mn)As. Copyright (C) EPLA, 2010

引用

页数：5

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