Universal Method for Separating Spin Pumping from Spin Rectification Voltage of Ferromagnetic Resonance

被引：121

作者：

Bai, Lihui ^{[1
]}

Hyde, P. ^{[1
]}

Gui, Y. S. ^{[1
]}

Hu, C. -M. ^{[1
]}

Vlaminck, V. ^{[2
,3
]}

Pearson, J. E. ^{[2
,3
]}

Bader, S. D. ^{[2
,3
]}

Hoffmann, A. ^{[2
,3
]}

机构：

[1] Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada

[2] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[3] Argonne Natl Lab, Nanosci & Technol Div, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 21期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Compendex;

D O I：

10.1103/PhysRevLett.111.217602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We develop a method for universally resolving the important issue of separating spin pumping from spin rectification signals in bilayer spintronics devices. This method is based on the characteristic distinction of spin pumping and spin rectification, as revealed in their different angular and field symmetries. It applies generally for analyzing charge voltages in bilayers induced by the ferromagnetic resonance (FMR), independent of FMR line shape. Hence, it solves the outstanding problem that device-specific microwave properties restrict the universal quantification of the spin Hall angle in bilayer devices via FMR experiments. Furthermore, it paves the way for directly measuring the nonlinear evolution of spin current generated by spin pumping. The spin Hall angle in a Py/Pt bilayer is thereby directly measured as 0.021 +/- 0.015 up to a large precession cone angle of about 20 degrees.

引用

页数：5

共 30 条

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