Spin wave modulation by topographical perturbation in Y3Fe5O12 thin films
Spin wave modulation by topographical perturbation in Y3Fe5O12 thin films
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DOI：
10.1063/1.5130186
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发表时间：
2020-01-01
期刊：
影响因子：
1.6
通讯作者：
Tabata, Hitoshi
中科院分区：
文献类型：
--
作者：
Sarker, Md Shamim;Yamahara, Hiroyasu;Tabata, Hitoshi
我们比较了Au/Y3Fe5O12和Pt/Y3Fe5O12双分子层中自旋波的传播。利用协同规划波导的微波技术激发和探测自旋波。我们观察到在Y3Fe5O12表面放置金属条会抑制自旋波的传播强度，这是由于自旋从Y3Fe5O12泵浦向非磁性金属条。然而，在Au和Pt电极层中观察到抑制性能的显著差异，这不能用自旋泵浦引起的阻尼常数的增强来解释。自旋回流和双磁振子散射是Au/Y3Fe5O12双分子层体系中自旋波传播受到明显抑制的主要原因。(c) 2020作者。除另有说明外，所有文章内容均遵循知识共享署名（CC BY）许可协议（http://creativecommons.org/licenses/by/4.0/）。
We present a comparison of the spin wave propagation in Au/Y3Fe5O12 and Pt/Y3Fe5O12 bilayers. Microwave technique with a co-planner waveguide arrangement was used to excite and detect the spin wave. We observed a suppression in the propagating spin wave intensity when a metal stripe is placed on the surface of Y3Fe5O12 in the spin wave propagation path due to the spin pumping from Y3Fe5O12 to nonmagnetic metal stripe. However, a significant difference in the suppression property was observed with the Au and Pt electrode layers, which cannot be explained by the enhancement of the damping constant induced by spin pumping alone. The significant suppression of the spin wave propagation in the Au/Y3Fe5O12 bilayer system is attributed to the spin backflow and two magnon scattering. (c) 2020 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).