We investigated the self-induced inverse spin Hall effect in ferromagnets. Temperature (T), thickness (t), and angular-dependent measurements of transverse voltage in spin pumping experiments were performed with permalloy films. Results revealed nonmonotonous T dependence of the self-induced transverse voltage. Qualitative agreement was found with first-principles calculations unravelling the skew scattering, side-jump, and intrinsic contributions to the T-dependent spin Hall conductivity. Experimental data were similar whatever the material in contact with permalloy (oxides or metals), and revealed an increase of produced current with t, demonstrating a bulk origin of the effect.
Bibliographical noteKAUST Repository Item: Exported on 2021-04-10
Acknowledged KAUST grant number(s): Grant No. OSR-2015-CRG4-2626
Acknowledgements: We acknowledge financial support from the French national research agency (ANR) (Grant No. ANR-15-CE24-0015-01) and KAUST (Grant No. OSR-2015-CRG4-2626). We also thank O. Sipr for fruitful discussions and M. Gallagher-Gambarelli for critical reading of the manuscript.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.