Time-domain measurements of nanomagnet dynamics driven by spin-transfer torques

被引：458
|
作者：
Krivorotov, IN [1 ]
Emley, NC [1 ]
Sankey, JC [1 ]
Kiselev, SI [1 ]
Ralph, DC [1 ]
Buhrman, RA [1 ]
机构：
[1] Cornell Univ, Ithaca, NY 14853 USA
来源：
SCIENCE | 2005年 / 307卷 / 5707期
关键词：
D O I：
10.1126/science.1105722
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
We present time-resolved measurements of gigahertz-scale magnetic dynamics caused by torque from a spin-polarized current. By working in the time domain, we determined the motion of the magnetic moment throughout the process of spin-transfer-driven switching, and we measured turn-on times of steady-state precessional modes. Time-resolved studies of magnetic relaxation allow for the direct measurement of magnetic damping in a nanomagnet and prove that this damping can be controlled electrically using spin-polarized currents.
引用
收藏
页码：228 / 231
页数：4
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