期刊
JOURNAL OF PHYSICS-MATERIALS
卷 3, 期 1, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/2515-7639/ab45cc
关键词
dynamical spin injection based on heat; heat transport in hybrid structure; nanomagnetism
资金
- JSPS Program for Fostering Globally Talented Researchers, JST CREST [JPMJCR18J1, 26103002, 18H03866]
The dynamical spin injection in a ferromagnetic/paramagnetic bilayer with various paramagnetic layers has been examined by using the inverse spin Hall effect. We adapt a CoFeB film as a ferromagnetic layer, which has a large spin dependent Seebeck coefficient. The contribution of the spin pumping was evaluated from the line-width change of the ferromagnetic resonant spectra while that of the thermal spin injection was evaluated from the heat conductivity for the paramagnetic layer. We find that the spin Hall voltage does not show the systematic change with respect to the line-width change. However, the normalized spin Hall voltage is found to increase with the heat conductivity for the paramagnetic layer. These results suggest that the thermal spin injection is a major contribution for the dynamical spin injection in CoFeB/paramagnetic bilayer systems.
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