Large charge-spin conversion in a metallic glass is expected due to disordered atomic structure. Here, we report spin–orbit torque in ferromagnet/metallic glass bilayer, in which spin current generated in the metallic glass injects into the ferromagnetic layer and exerts spin-transfer torque. The effective spin-Hall angle in Pd–Si binary alloy/Ni–Fe bilayer is evaluated by modulation of damping and spectrum shape analysis in spin-torque ferromagnetic resonance experiment. Our results indicate that Pd–Si metallic glass has large charge-spin conversion efficiency compared with Pd.

中文翻译：

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铁磁体/金属玻璃双层产生的自旋轨道转矩

由于无序的原子结构，预计在金属玻璃中会有大的电荷自旋转换。在这里，我们报告了铁磁体/金属玻璃双层中的自旋轨道扭矩，其中在金属玻璃中产生的自旋电流注入铁磁层并施加自旋传递扭矩。Pd-Si二元合金/ Ni-Fe双层中的有效自旋霍尔角通过自旋扭矩铁磁共振实验中的阻尼调制和频谱形状分析来评估。我们的结果表明，与Pd相比，Pd-Si金属玻璃具有较大的电荷自旋转换效率。