Spin Hall angle in iridate/manganite heterostructures

We present results on experimental determination of spin-Hall angle $\theta_{\mathrm{SH}}$ in the SrIrO$_3$/La$_{0.7}$Sr$_{0.3}$MnO$_3$ heterostructure with nanometer-thick films. From longitudinal magnetoresistance value of spin-Hall angle was estimated $\theta^L_{\mathrm{SH}}\approx$ 0.04 $\pm$ 0.01, from the transverse $\theta^T_{\mathrm{SH}}\approx$ 0.35 $\pm$ 0.06. Decreasing the temperature from room to $T$ = 165 K, the transverse magnetoresistance decreased, and at temperatures $T<$ 150 K it was not detected within the measurement error. For comparison, we measured also a single SrIrO$_3$ film which did not demonstrate magnetoresistance.