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

Abstract : 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.
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O. Gladii, L. Frangou, A. Hallal, R. 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), American Physical Society, 2019, 100, pp.174409. ⟨10.1103/PhysRevB.100.174409⟩. ⟨hal-02276641v2⟩

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