High-efficiency control of spin-wave propagation in ultra-thin yttrium iron garnet by the spin-orbit torque
High-efficiency control of spin-wave propagation in ultra-thin yttrium iron garnet by the spin-orbit torque
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DOI：
10.1063/1.4948252
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发表时间：
2016-04-25
影响因子：
4
通讯作者：
Anane, A.
中科院分区：
文献类型：
--
作者：
Evelt, M.;Demidov, V. E.;Anane, A.
本文以亚微米空间分辨率实验研究了基于纳米厚钇铁石榴石层和铂层的微波导中自旋波的传播。我们证明，通过使用自旋轨道扭矩，自旋波在这种系统中的传播长度可以增加近10倍，这相当于10 μ m长传输线输出处的自旋波强度增加了三个数量级。我们还表明，在磁阻尼完全由自旋轨道转矩补偿的情况下，自旋波放大被电流诱导激发的相干自旋波的非线性散射所抑制。AIP出版社出版。
We study experimentally with submicrometer spatial resolution the propagation of spin waves in microscopic waveguides based on the nanometer-thick yttrium iron garnet and Pt layers. We demonstrate that by using the spin-orbit torque, the propagation length of the spin waves in such systems can be increased by nearly a factor of 10, which corresponds to the increase in the spin-wave intensity at the output of a 10 mu m long transmission line by three orders of magnitude. We also show that, in the regime, where the magnetic damping is completely compensated by the spin-orbit torque, the spin-wave amplification is suppressed by the nonlinear scattering of the coherent spin waves from current-induced excitations. Published by AIP Publishing.