论文标题
氧化虹膜中的自旋泵送和反自旋大厅效应
Spin pumping and inverse spin Hall effect in iridium oxide
论文作者
论文摘要
大型旋转转换（旋转大厅角）和自旋霍尔电导率是开发下一代动力有效旋转设备的先决条件。在这种情况下，通常会考虑重金属（例如PT，W等），拓扑绝缘子，抗铁磁体，因为它们表现出高自旋轨道耦合（SOC）。除上述材料外，5D过渡金属氧化物，例如氧化虹膜（IRO 2）是一种潜在的候选者，具有很高的SOC强度。在这里，我们在IRO 2 /COFEB系统中报告了一项通过铁磁共振（FMR）的自旋抽水和反旋转厅效应（ISHE）的研究。我们通过研究ISHE信号的平面内角依赖性来确定自旋泵化和其他自旋矫正效果的个人贡献。我们的分析显示自旋泵送效应对ISHE信号的显着贡献。我们表明，多晶IRO 2薄膜表现出与PT值相当的高自旋霍尔电导率和自旋霍尔角。
Large charge-to-spin conversion (spin Hall angle) and spin Hall conductivity are prerequisites for development of next generation power efficient spintronic devices. In this context, heavy metals (e.g. Pt, W etc.), topological insulators, antiferromagnets are usually considered because they exhibit high spin-orbit coupling (SOC). In addition to the above materials, 5d transition metal oxide e.g. Iridium Oxide (IrO 2 ) is a potential candidate which exhibits high SOC strength. Here we report a study of spin pumping and inverse spin Hall effect (ISHE), via ferromagnetic resonance (FMR), in IrO 2 /CoFeB system. We identify the individual contribution of spin pumping and other spin rectification effects in the magnetic layer, by investigating the in-plane angular dependence of ISHE signal. Our analysis shows significant contribution of spin pumping effect to the ISHE signal. We show that polycrystalline IrO 2 thin film exhibits high spin Hall conductivity and spin Hall angle which are comparable to the values of Pt.
