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

被引：465

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

页码：228 / 231

页数：4

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