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首页> 外文期刊>Physical review >Simultaneous spin pumping and spin Seebeck experiments with thermal control of the magnetic damping in bilayers of yttrium iron garnet and heavy metals: YIG/Pt and YIG/IrMn
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Simultaneous spin pumping and spin Seebeck experiments with thermal control of the magnetic damping in bilayers of yttrium iron garnet and heavy metals: YIG/Pt and YIG/IrMn

机译：同时控制钇铁石榴石和重金属：YIG / Pt和YIG / IrMn双层磁阻尼的自旋泵浦和自旋塞贝克实验

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摘要

We report experiments on the generation of spin currents by simultaneous spin pumping effect and spin Seebeck effect (SSE) in bilayers of yttrium iron garnet (YIG)/Pt and YIG/IrMn. The experiments are performed with the ferromagnetic resonance (FMR) in YIG excited by microwave radiation in the range of 2-6 GHz and subject to a temperature gradient as in studies of the longitudinal SSE. Measurements of the FMR linewidth show that the magnetic damping in YIG can be controlled by spin currents generated by the thermal gradient across the thickness of the bilayer. The simultaneous measurements allow the determination of the spin current generated by SSE and a quantitative comparison of the models proposed for thermal control of the magnetic damping with experimental data. We show that the model based on the flow of angular momentum into or out of the YIG film carried by the coherent part of the spin current influenced by the temperature gradient is the one that best accounts for the observed change in the damping.
机译：我们报告了在钇铁石榴石（YIG）/ Pt和YIG / IrMn双层中通过同时自旋泵浦效应和自旋塞贝克效应（SSE）产生自旋电流的实验。实验是在YIG的铁磁共振（FMR）中进行的，该YIG由2-6 GHz范围内的微波辐射激发，并经受纵向SSE研究中的温度梯度。 FMR线宽的测量结果表明，YIG中的磁阻尼可以通过双层厚度上的热梯度产生的自旋电流来控制。同时进行的测量可以确定由SSE产生的自旋电流，并可以对建议用于磁阻尼热控制的模型与实验数据进行定量比较。我们表明，基于角动量流入或流出受温度梯度影响的自旋电流相干部分携带的YIG薄膜的模型是最能说明观察到的阻尼变化的模型。

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  • 来源
    《Physical review》 |2017年第13期|134432.1-134432.7|共7页
  • 作者

    J. Holanda; O. Alves Santos; R. L. Rodriguez-Suarez; A. Azevedo; S. M. Rezende;

  • 作者单位

    Departamento de Fisica, Universidade Federal de Pemambuco, 50670-901 Recife, Pernambuco, Brazil;

    Departamento de Fisica, Universidade Federal de Pemambuco, 50670-901 Recife, Pernambuco, Brazil;

    Facultad de Fisica, Pontificia Universidad Catdlica de Chile, Casilla 306 Santiago, Chile;

    Departamento de Fisica, Universidade Federal de Pemambuco, 50670-901 Recife, Pernambuco, Brazil;

    Departamento de Fisica, Universidade Federal de Pemambuco, 50670-901 Recife, Pernambuco, Brazil;

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