Nonlinear spin conductance of yttrium iron garnet thin films driven by large spin-orbit torque
Nonlinear spin conductance of yttrium iron garnet thin films driven by large spin-orbit torque
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DOI：
10.1103/physrevb.97.060409
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发表时间：
2017-02
影响因子：
3.7
通讯作者：
N. Thiéry;A. Draveny;V. Naletov;L. Vila;Jean-Philippe Attan'e;G. D. Loubens;M. Viret;N. Beaulieu;J. B. Youssef;V. Demidov;S. Demokritov;A. Slavin;V. Tiberkevich;A. Anane;P. Bortolotti;V. Cros;O. Klein
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文献类型：
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作者：
N. Thiéry;A. Draveny;V. Naletov;L. Vila;Jean-Philippe Attan'e;G. D. Loubens;M. Viret;N. Beaulieu;J. B. Youssef;V. Demidov;S. Demokritov;A. Slavin;V. Tiberkevich;A. Anane;P. Bortolotti;V. Cros;O. Klein
我们研究了Yttrium Iron Garnet(YIG)超薄膜中的自旋电导，其中自旋输运是由传播的自旋波提供的，自旋波是由沉积在顶部的两根铂丝中的正反自旋霍尔效应产生并检测到的。在低电流时，自旋电导主要由热磁子的输运决定，而在大电流下，自旋电导主要由低阻抗的非平衡磁子主导，这些非平衡磁子通过磁振子与磁振子相互作用在光谱底部附近被加热，从而对外加磁场的敏感性和较长的衰变长度。这张照片得到了微焦点布里渊光散射光谱的支持。
We report a study on spin conductance in ultra-thin films of Yttrium Iron Garnet (YIG), where spin transport is provided by propagating spin waves, that are generated and detected by direct and inverse spin Hall effects in two Pt wires deposited on top. While at low current the spin conductance is dominated by transport of thermal magnons, at high current, the spin conductance is dominated by low-damping non-equilibrium magnons thermalized near the spectral bottom by magnon-magnon interaction, with consequent a sensitivity to the applied magnetic field and a longer decay length. This picture is supported by microfocus Brillouin Light Scattering spectroscopy.