Anomalous Hall effect in YIG|Pt bilayers

We measure the ordinary and the anomalous Hall effect in a set of yttrium iron garnet|platinum (YIG|Pt) bilayers via magnetization orientation dependent magnetoresistance experiments. Our data show that the presence of the ferrimagnetic insulator YIG leads to an anomalous Hall effect like voltage in Pt, which is sensitive to both Pt thickness and temperature. Interpretation of the experimental findings in terms of the spin Hall anomalous Hall effect indicates that the imaginary part of the spin mixing conductance $Gi$ plays a crucial role in YIG|Pt bilayers. In particular, our data suggest a sign change in $Gi$ between $10 K$ and $300 K$⁠. Additionally, we report a higher order Hall effect contribution, which appears in thin Pt films on YIG at low temperatures.