Classical description of spin wave excitation by currents in bulk ferromagnets

被引：16

作者：

Ansermet, JP ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Phys Nanostruct, CH-1015 Lausanne, Switzerland

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2004年 / 40卷 / 02期

关键词：

exchange torque; magnetization reversal; spin injection; spin waves;

D O I：

10.1109/TMAG.2004.824120

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A modification of the Laudau-Lifshitz equation accounts for the effect of the current on the magnetization in the "slow passage" limit, according to which the spins precess about,the exchange field quickly in comparison to the rate of change of the orientation of the magnetization as seen in the reference frame of the conduction electrons. This model implies that the spin polarization of the current provokes an instability of the magnetization in the bulk of a ferromagnet when the current density reaches a threshold.

引用

页码：358 / 360

页数：3

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