We investigate spin-orbit torques of metallic CuAu-I-type antiferromagnets using spin-torque ferromagnetic resonance tuned by a dc-bias current. The observed spin torques predominantly arise from diffusive transport of spin current generated by the spin Hall effect. We find a growth-orientation dependence of the spin torques by studying epitaxial samples, which may be correlated to the anisotropy of the spin Hall effect. The observed anisotropy is consistent with first-principles calculations on the intrinsic spin Hall effect. Our work demonstrates large tunable spin-orbit effects in magnetically-ordered materials.
@article{arxiv.1508.07906,
title = {All electrical manipulation of magnetization dynamics in a ferromagnet by antiferromagnets with anisotropic spin Hall effects},
author = {Wei Zhang and Matthias B. Jungfleisch and Frank Freimuth and Wanjun Jiang and Joseph Sklenar and John E. Pearson and John B. Ketterson and Yuriy Mokrousov and Axel Hoffmann},
journal= {arXiv preprint arXiv:1508.07906},
year = {2015}
}
Comments
7 pages, 6 figures, to appear in Phys. Rev. B (2015)