Abstract We have demonstrated enhancement of the spin-charge current interconversion by oxidation of rhenium (Re). Although amorphous rhenium oxide (ReOX) is electrically conductive, the spin-orbit torque efficiency measured by spin-torque ferromagnetic resonance is 0.074, and 37 times larger than the pure Re case whose amplitude is 0.002. Furthermore, we have also found that the values of the damping-like and field-like torque efficiencies are 0.030 and -0.052, respectively. These values are comparable with those for conventional spin-orbit materials such as Pt or Ta, suggesting that ReOX is a candidate material for spintronics devices. THz-time domain spectroscopy was performed to confirm the inverse spin-charge current conversion process in ReOX.

中文翻译：

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铼氧化增强自旋电荷电流互变

摘要 我们已经证明了通过氧化铼 (Re) 来增强自旋电荷电流互变。尽管无定形氧化铼（ReOX）具有导电性，但通过自旋扭矩铁磁共振测量的自旋轨道扭矩效率为 0.074，是振幅为 0.002 的纯 Re 情况的 37 倍。此外，我们还发现类阻尼和类场转矩效率的值分别为 0.030 和 -0.052。这些值与 Pt 或 Ta 等传统自旋轨道材料的值相当，表明 ReOX 是自旋电子器件的候选材料。进行太赫兹时域光谱以确认 ReOX 中的反向自旋电荷电流转换过程。