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We report on a comparative study of spin Hall related effects andmagnetoresistance in YIG|Pt and YIG|Ta bilayers. These combined measurementsallow to estimate the characteristic transport parameters of both Pt and Talayers juxtaposed to YIG: the spin mixing conductance $G_{\uparrow \downarrow}$at the YIG$|$normal metal interface, the spin Hall angle $\Theta_{SH}$, and thespin diffusion length $\lambda_{sd}$ in the normal metal. The inverse spin Hallvoltages generated in Pt and Ta by the pure spin current pumped from YIGexcited at resonance confirm the opposite signs of spin Hall angles in thesetwo materials. Moreover, from the dependence of the inverse spin Hall voltageon the Ta thickness, we extract the spin diffusion length in Ta, found to be$\lambda_{sd}^\text{Ta}=1.8\pm0.7$ nm. Both the YIG|Pt and YIG|Ta systemsdisplay a similar variation of resistance upon magnetic field orientation,which can be explained in the recently developed framework of spin Hallmagnetoresistance.

Comparative Measurements of Inverse Spin Hall and Magnetoresistance in YIG|Pt and YIG|Ta