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Spin Hall magnetoimpedance

机译:自旋霍尔磁阻

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摘要

The recently discovered spin Hall magnetoresistance effect electrically probes pure spin current flow across a ferrimagnetic insulatorormal metal bilayer interface. While usually the dc electrical resistance of the bilayer is measured as a function of the magnetization orientation in the magnetic insulator, here we present magnetoimpedance measurements using bias currents with frequencies up to several GHz. We find that the spin Hall magnetoresistance effect is frequency independent up to frequencies of 3 GHz, corroborating the assumption of a frequency-independent spin Hall angle. Our data therefore show that all interaction time constants relevant for the spin Hall magnetoresistance effect are shorter than about 50 ps. Therefore this technique should allow for the fast readout of the magnetization direction in magnetic insulatorormal metal bilayers.
机译:最近发现的自旋霍尔磁阻效应可电探测纯自旋电流流过亚铁磁绝缘体/正常金属双层界面的情况。通常,双层磁阻的直流电阻是根据磁绝缘体中磁化取向的函数进行测量的,在此,我们介绍了使用频率高达几GHz的偏置电流进行的磁阻测量。我们发现自旋霍尔磁阻效应在频率高达3 GHz时与频率无关,从而证实了与频率无关的自旋霍尔角的假设。因此,我们的数据表明,与自旋霍尔磁阻效应相关的所有相互作用时间常数都小于约50 ps。因此,该技术应允许在磁性绝缘体/普通金属双层中快速读出磁化方向。

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  • 来源
    《Physical review》 |2014年第17期|174419.1-174419.5|共5页
  • 作者单位

    Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany,Physik-Department, Technische Universitaet Muenchen, 85748 Garching, Germany;

    Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany,Nanosystems Initiative Munich (NIM), 80799 Muenchen, Germany;

    Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany,Physik-Department, Technische Universitaet Muenchen, 85748 Garching, Germany,Nanosystems Initiative Munich (NIM), 80799 Muenchen, Germany;

    Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany,Nanosystems Initiative Munich (NIM), 80799 Muenchen, Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    spin transport through interfaces; current-driven spin pumping; magnetotransport phenomena; materials for magnetotransport;

    机译:通过接口旋转传输;电流驱动的自旋泵浦;磁传输现象;磁运输材料;

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