Quantification of the spin-Hall anti-damping torque with a resonance spectrometer

被引：15

作者：

Emori, Satoru ^{[1
]}

Nan, Tianxiang ^{[1
]}

Oxholm, Trevor M. ^{[1
]}

Boone, Carl T. ^{[1
]}

Jones, John G. ^{[2
]}

Howe, Brandon M. ^{[2
]}

Brown, Gail J. ^{[2
]}

Budil, David E. ^{[3
]}

Sun, Nian X. ^{[1
]}

机构：

[1] Northeastern Univ, Dept Elect & Comp Engn, Boston, MA 02115 USA

[2] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA

[3] Northeastern Univ, Dept Chem, Boston, MA 02115 USA

来源：

APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 02期

基金：

中国国家自然科学基金;

关键词：

DRIVEN;

D O I：

10.1063/1.4906062

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present a simple technique using a cavity-based resonance spectrometer to quantify the anti-damping torque due to the spin Hall effect. Modification of ferromagnetic resonance is observed as a function of small DC current in sub-mm-wide strips of bilayers, consisting of magnetically soft FeGaB and strong spin-Hall metal Ta. From the detected current-induced linewidth change, we obtain an effective spin Hall angle of 0.08-0.09 independent of the magnetic layer thickness. Our results demonstrate that a sensitive resonance spectrometer can be a general tool to investigate spin Hall effects in various material systems, even those with vanishingly low conductivity and magnetoresistance. (C) 2015 AIP Publishing LLC.

引用

页数：5

共 45 条

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