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Spin-Torque Excitation of Perpendicular Standing Spin Waves in CoupledYIG/CoHeterostructures
Physical Review Letters ( IF 8.6 ) Pub Date : 2018-03-23 00:00:00 , DOI: 10.1103/physrevlett.120.127201
Stefan Klingler , Vivek Amin , Stephan Geprägs , Kathrin Ganzhorn , Hannes Maier-Flaig , Matthias Althammer , Hans Huebl , Rudolf Gross , Robert D. McMichael , Mark D. Stiles , Sebastian T. B. Goennenwein , Mathias Weiler

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 interlayer but persists with a copper interlayer, in agreement with the proposed model.

中文翻译:

YIG / CoHeterostructures中的垂直驻波的自旋扭矩激励

我们调查使用宽带铁磁共振(FMR)的钇铁石榴石(YIG)/钴(Co)异质结构。当YIG PSSW的共振频率与Co FMR线的共振频率重合时,我们观察到YIG层中垂直驻波(PSSW)的有效激发。使用相互旋转泵送和交换扭矩找到并避免了YIG PSSW和Co FMR线的交叉。与所提出的模型一致,薄的氧化铝夹层抑制了PSSWs的激励,但铜夹层仍保持了激励。
更新日期:2018-03-23
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