Influence of the Demagnetizing Field in Spin Dynamics With a Perpendicular-to-Plane Polarizer

被引:0
|
作者
Chang, Jui-Hang [1 ]
Chang, Ching-Ray
机构
[1] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan
关键词
Microwave oscillator; perpendicular-to-plane polarizer; spin dynamics; spin-injection device; spin precession; spin-transfer torque;
D O I
暂无
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
The authors derive an analytical form of the critical current density for the gyromagnetic precession in spin-transfer torque (STT) devices. The STT device which is injected by a perpendicular-to-plane polarized current has very different properties. We find that the critical current needed to generate a large cone-angle precession motion depends on the Gilbert damping constant, in-plane anisotropy field, stray field, and demagnetizing filed. Compared to the most used STT device, which is injected by a current with in-plane spin polarization, the critical current is always smaller.
引用
收藏
页码:2508 / 2511
页数:4
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