Self-induced inverse spin Hall effect in ferromagnets: demonstration through non-monotonic temperature-dependence in permalloy

O. Gladii (1) , L. Frangou (1) , A. Hallal (1) , R. L Seeger (1) , P. Noël (1) , G. Forestier (1) , S. Auffret (1) , M. Rubio-Roy (1) , P. Warin (1) , L. Vila (1) , S. Wimmer (2) , H. Ebert (2) , S. Gambarelli (3) , M Chshiev (1) , Vincent Baltz (1)

1 SPINTEC - SPINtronique et TEchnologie des Composants
2 Universität der Bundeswehr München [Neubiberg]
3 IRIG - Institut de Recherche Interdisciplinaire de Grenoble

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 non-monotonous T-dependence of the self-induced transverse voltage. Qualitative agreement was found with first-principle 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.

Domaines: Matière Condensée [cond-mat]

O. Gladii, L. Frangou, A. Hallal, R. L Seeger, P. Noël, et al.. Self-induced inverse spin Hall effect in ferromagnets: demonstration through non-monotonic temperature-dependence in permalloy. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2019, 100, pp.174409. ⟨10.1103/PhysRevB.100.174409⟩. ⟨hal-02276641v2⟩