Synchronization of spin Hall nano-oscillators to external microwave signals

被引：113

作者：

Demidov, V. E. ^{[1
,2
]}

Ulrichs, H. ^{[1
,2
]}

Gurevich, S. V. ^{[1
,2
]}

Demokritov, S. O. ^{[1
,2
]}

Tiberkevich, V. S. ^{[3
]}

Slavin, A. N. ^{[3
]}

Zholud, A. ^{[4
]}

Urazhdin, S. ^{[4
]}

机构：

[1] Univ Munster, Dept Phys, D-48149 Munster, Germany

[2] Univ Munster, Ctr Nonlinear Sci, D-48149 Munster, Germany

[3] Oakland Univ, Dept Phys, Rochester, MI 48309 USA

[4] Emory Univ, Dept Phys, Atlanta, GA 30322 USA

来源：

NATURE COMMUNICATIONS | 2014年 / 5卷

基金：

美国国家科学基金会;

关键词：

D O I：

10.1038/ncomms4179

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：

Recently, a novel type of spin-torque nano-oscillators driven by pure spin current generated via the spin Hall effect was demonstrated. Here we report the study of the effects of external microwave signals on these oscillators. Our results show that they can be efficiently synchronized by applying a microwave signal at approximately twice the frequency of the auto-oscillation, which opens additional possibilities for the development of novel spintronic devices. We find that the synchronization exhibits a threshold determined by magnetic fluctuations pumped above their thermal level by the spin current, and is significantly influenced by the nonlinear self-localized nature of the auto-oscillatory mode.

引用

页数：6

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