Spin-Torque Excitation of Perpendicular Standing Spin Waves in Coupled YIG/Co Heterostructures.
Spin-Torque Excitation of Perpendicular Standing Spin Waves in Coupled YIG/Co Heterostructures.
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DOI：
10.1103/physrevlett.120.127201
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发表时间：
2018-03-23
影响因子：
8.6
通讯作者：
Weiler M
中科院分区：
文献类型：
--
作者：
Klingler S;Amin V;Geprägs S;Ganzhorn K;Maier-Flaig H;Althammer M;Huebl H;Gross R;McMichael RD;Stiles MD;Goennenwein STB;Weiler M
我们使用宽带铁磁共振（FMR）研究钇铁石榴石（YIG）/钴（Co）异质结构。当 YIG PSSW 和 Co FMR 线的共振频率一致时，我们观察到 YIG 层中垂直自旋驻波 (PSSW) 的有效激发。使用相互自旋泵浦和交换扭矩找到并建模了 YIG PSSW 和 Co FMR 线的避免交叉。 PSSW 的激发受到薄氧化铝 (AlOx) 夹层的抑制，但铜 (Cu) 夹层仍然存在，这与所提出的模型一致。
We investigate yttrium iron garnet (YIG)/cobalt (Co) heterostructures using broadband ferromagnetic resonance (FMR). We observe an efficient excitation of perpendicular standing spin waves (PSSWs) in the YIG layer when the resonance frequencies of the YIG PSSWs and the Co FMR line coincide. Avoided crossings of YIG PSSWs and the Co FMR line are found and modeled using mutual spin pumping and exchange torques. The excitation of PSSWs is suppressed by a thin aluminum oxide (AlOx) interlayer but persists with a copper (Cu) interlayer, in agreement with the proposed model.