Observation of Spin-Orbit Effects with Spin Rotation Symmetry
Abstract
The spin-orbit interaction enables interconversion between a charge current and a spin current. It is usually believed that in a nonmagnetic metal (NM) or at a NM/ferromagnetic metal (FM) bilayer interface, the symmetry of spin-orbit effects (SOE) requires that the spin current, charge current and spin orientation are all orthogonal to each other. Here we show the observation of a SOE near the NM/FM interface that exhibits a very different symmetry from the conventional spin Hall effect, insofar as the spin polarization is further rotated about the magnetization. These results imply that a perpendicularly polarized spin current can be generated with an in-plane charge current simply by use of a FM/NM bilayer with magnetization collinear to the charge current. The ability to generate a spin current with arbitrary polarization using typical magnetic materials will greatly benefit the development of magnetic memories.
Keywords
Cite
@article{arxiv.1704.08998,
title = {Observation of Spin-Orbit Effects with Spin Rotation Symmetry},
author = {Alisha M. Humphries and Tao Wang and Eric R. J. Edwards and Shane R. Allen and Justin M. Shaw and Hans T. Nembach and John Q. Xiao and T. J. Silva and Xin Fan},
journal= {arXiv preprint arXiv:1704.08998},
year = {2018}
}