We performed direct microwave power injection into Pt/YIG, a heavy metal/ferrimagnetic insulator bilayer structure. The induced heating effect plays an important role in the interpretation of the ferromagnetic resonance signal. According to our frequency dependent measurements, we found the heat-induced inhomogeneous broadening in addition to the spin Hall magnetoresistance (SMR). From the angular dependent measurement, the thermal signals both in non-resonant and resonant states were observed, consistent with the angular dependence of longitudinal spin Seebeck signal. The heating effect from the injected rf power not only gives rise to the increase of inhomogeneous broadening factor Δ H 0 , but also contributes to the increase of damping constant, Δ α .

中文翻译：

---

微波直接注入引起的Pt / YIG异质结构的热效应

我们对重金属/亚铁磁性绝缘体双层结构Pt / YIG进行了直接微波功率注入。感应加热效应在解释铁磁共振信号中起着重要作用。根据我们的频率相关测量，除了自旋霍尔磁阻（SMR）以外，我们还发现了热诱导的不均匀展宽。从角度相关的测量中，可以观察到非共振和共振状态下的热信号，这与纵向自旋塞贝克信号的角度相关性一致。所注入的rf功率产生的热效应不仅导致不均匀扩展因子ΔH 0的增加，而且还导致阻尼常数Δα的增加。