Joint action of spin-transfer and spin-injection torques in ferromagnetic junctions

被引：0
|
作者：
Epshtein, Ernest [1 ]
Gulyaev, Yuri [1 ]
Zilberman, Peter [1 ]
机构：
[1] Russian Acad Sci, Inst Radioengn & Elect, Fryazino 141190, Russia
来源：
INTERNATIONAL JOURNAL OF NANOSCIENCE, VOL 6, NO 5 | 2007年 / 6卷 / 05期
基金：
俄罗斯基础研究基金会;
关键词：
ferromagnetic junctions; spin injection; spin torque;
D O I：
10.1142/S0219581X0700495X
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We consider theoretically a current flowing perpendicular to interfaces of a spin-valve type ferromagnetic metallic junction. For the first time a simultaneous action of the two current effects is investigated, namely, the nonequilibrium longitudinal spin injection and the transverse spin surface torque. Dispersion relations for fluctuations are derived and solved under the proper boundary conditions. Joint action of the two effects mentioned lowers the instability threshold, its typical value being 1 x 10(6)-3 x 10(7) A/cm(2). Spin wave excitations may soften near the threshold. A nonlinear problem is solved about steady state arising due to instability development.
引用
收藏
页码：363 / 366
页数：4
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