旋转泵
马格农
钇铁石榴石
凝聚态物理
坡莫合金
铁磁共振
联轴节(管道)
激光线宽
自旋(空气动力学)
材料科学
铁磁性
自旋波
物理
自旋霍尔效应
自旋极化
磁化
光学
磁场
激光器
电子
热力学
冶金
量子力学
作者
Ying Jin,Pengyang Gou,Fufu Liu,Yibing Zhao,Changjun Jiang
摘要
We investigate the strong correlation between magnon–magnon coupling (M–M coupling) and coherent spin pumping in yttrium iron garnet/permalloy (Y3Fe5O12, YIG/Py) heterostructure through spin-torque ferromagnetic resonance technique. We demonstrate experimentally that the spin pumping of hybrid modes is the strongest near the coupling region at 295 K, indicating that coherent spin pumping is closely associated with magnon hybridization. Meanwhile, the coupling strength gc increases from 0.26 to 0.37 GHz with temperature reduction from 295 to 260 K, which is attributed to the enhancement of spin pumping, especially the hybrid mode characterized by spin pumping out of Py that provides a pronounced contribution. Furthermore, the increased linewidth of the hybrid mode near the coupling region at low temperatures leads to enhanced spin mixing conductivity. This enhancement, in turn, improves spin pumping. Our experiments discuss the underlying mechanisms that influence coupling strength in detail, providing deeper insights into tuning M–M coupling.
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