与非本征微波效应分离的自旋抽运电压测量
Measurement of spin pumping voltage separated from extrinsic microwave effects
摘要：
自旋电流与电荷电流的相互转换是近年来自旋电子学的核心技术。在这篇文章中，我们提供的方法来估计逆自旋霍尔效应（ISHEs）诱导使用微波驱动的自旋泵（SP）作为自旋电流发生器。ISHE和SP在铁磁或自旋波共振时感应电动势，这为研究材料中的自旋物理提供了有价值的电学方法。在谐振时，用于激发磁化动力学的微波经由射频电流整流和热电效应感应出附加电动势。我们讨论的方法来分离从这样的外在微波效应产生的信号，通过控制样品的结构和配置。这些方法有助于对SP诱导的ISHE进行精确测量，从而定量研究各种材料上自旋电流和电荷电流之间的转换。
英文摘要：
Conversions between spin and charge currents are core technologies in recent spintronics. In this article, we provide methods for estimating inverse spin Hall effects (ISHEs) induced by using microwave-driven spin pumping (SP) as a spin-current generator. ISHE and SP induce an electromotive force at the ferromagnetic or spin-wave resonance, which offers a valuable electric way to study spin physics in materials. At the resonance, a microwave for exciting the magnetization dynamics induces an additional electromotive force via rf-current rectification and thermoelectric effects. We discuss methods to separate the signals generated from such extrinsic microwave effects by controlling sample structures and configurations. These methods are helpful in performing accurate measurements on ISHE induced by SP, enabling quantitative studies on the conversion between spin and charge currents on various kinds of materials.
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