期刊
APPLIED PHYSICS EXPRESS
卷 13, 期 6, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.35848/1882-0786/ab88c2
关键词
THz wave; pulsed laser; films; spin current; ferrimagnets
资金
- Graduate Program in Spintronics (GP-Spin) at Tohoku University
- KAKENHI [16H03846, 26103004, 19K15430]
- CSRN
- Grants-in-Aid for Scientific Research [19K15430, 16H03846] Funding Source: KAKEN
We investigated laser-pulse-induced terahertz (THz) emission in Ta/CoFeB/Ir/CoFeB/Ta layered synthetic magnets with different Ir spacer thicknesses. THz emissions were observed under no applied magnetic fields for samples exhibiting interlayer antiferromagnetic exchange couplings, and those THz emissions also showed oscillatory behavior against the Ir spacer thicknesses. These results are qualitatively explained with the THz emission mechanism due to the inverse spin Hall effect for the laser-induced spin current in the layered structures. We also discuss the effect of a non-collinear configuration of magnetizations on THz emission with macrospin simulation.
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