arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.01865cond-mat.mtrl-sci
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氧化铱中的自旋泵浦和反自旋霍尔效应

Spin pumping and inverse spin Hall effect in iridium oxide

Biswajit Sahoo, Koustuv Roy, Pushpendra Gupta, Biswarup Satpati, Braj B. Singh, Subhankar Bedanta

摘要:

大的电荷-自旋转换(自旋霍尔角)和自旋霍尔电导率是开发下一代功率高效自旋电子器件的先决条件。在这种情况下,重金属(如Pt、W等),拓扑绝缘体、反铁磁体通常被考虑,因为它们表现出高自旋轨道耦合(SOC)。除了上述材料之外,5d过渡金属氧化物例如氧化铱(IrO 2)是表现出高SOC强度的潜在候选物。本文报道了利用铁磁共振(FMR)研究IrO 2 /CoFeB系统的自旋抽运和逆自旋霍尔效应(ISHE).通过研究ISHE信号的面内角度依赖性,我们确定了磁性层中自旋泵浦和其他自旋整流效应的单独贡献。我们的分析表明,自旋泵效应的ISHE信号的显着贡献。结果表明,多晶IrO 2薄膜具有与Pt相当的高自旋霍尔电导率和自旋霍尔角。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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