Observation of the nonlocal spin-orbital effective field

被引：233

作者：

Fan, Xin ^{[1
]}

Wu, Jun ^{[1
]}

Chen, Yunpeng ^{[1
]}

Jerry, Matthew J. ^{[1
]}

Zhang, Huaiwu ^{[2
]}

Xiao, John Q. ^{[1
]}

机构：

[1] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

[2] Univ Elect Sci & Technol China, State Key Lab Elect Films & Integrated Devices, Chengdu 610054, Peoples R China

来源：

NATURE COMMUNICATIONS | 2013年 / 4卷

基金：

美国国家科学基金会;

关键词：

DRIVEN; MAGNETIZATION; VECTOR; TA;

D O I：

10.1038/ncomms2709

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：

The spin-orbital interaction in heavy nonmagnetic metal/ferromagnetic metal bilayer systems has attracted great attention and exhibited promising potentials in magnetic logic devices, where the magnetization direction is controlled by passing an electric current. It is found that the spin-orbital interaction induces both an effective field and torque on the magnetization, which have been attributed to two different origins: the Rashba effect and the spin Hall effect. It requires quantitative analysis to distinguish the two mechanisms. Here we show sensitive spin-orbital effective field measurements up to 10nm thick ferromagnetic layer and find the effective field rapidly diminishes with the increase of the ferromagnetic layer thickness. We further show that this effective field persists even with the insertion of a copper spacer. The nonlocal measurement suggests that the spin-orbital effective field does not rely on the heavy normal metal/ferromagnetic metal interface.

引用

页数：7

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