Spin pumping from spinwaves in thin film YIG

Spin pumping from spinwaves in thin film YIG
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薄膜 YIG 中自旋波的自旋泵浦

DOI:
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发表时间:
2015
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影响因子:
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通讯作者:
P. Hammel
P. Hammel
中科院分区:
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文献类型:
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作者:
Sergei A. Manuilov;C. Du;R. Adur;Hailong Wang;V. Bhallamudi;Fengyuan Yang;P. Hammel

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我们报告了 YIG(25nm)/Pt(5nm) 双层中参数激发传播高 k 自旋波的自旋泵浦效率。我们观察到利用逆自旋霍尔效应检测到的清晰信号。测量的自旋泵浦效率和参数激发所需的微波阈值表明,自旋泵浦对自旋波波矢幅度和传播方向在0≤k≲20μm−1范围内不敏感。这一发现与以下事实相一致:对于薄膜,自旋波振幅在整个薄膜厚度上的变化仅微弱地依赖于波矢。我们的结果对于开发由自旋波操作的基于自旋的设备是有希望的。
We report on the efficiency of spin pumping from parametrically excited propagating high-k spinwaves in a YIG(25 nm)/Pt(5 nm) bilayer. We observe clear signals, detected using the inverse spin Hall effect. The measured spin pumping efficiency and microwave thresholds needed for parametric excitation indicate that spin pumping is insensitive to the spinwave wavevector magnitude and propagation direction in the range 0≤k≲20 μm−1. This finding is consistent with the fact that for thin films, the variation of spin wave amplitude across the film thickness is only weakly dependent on the wavevector. Our results are promising for the development of spin-based devices operated by spinwaves.
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影响因子: 8.6
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