期刊
JAPANESE JOURNAL OF APPLIED PHYSICS
卷 60, 期 12, 页码 -出版社
IOP Publishing Ltd
DOI: 10.35848/1347-4065/ac3b00
关键词
magnon temperature; magnon-phonon thermal relaxation; magneto-optic Kerr effect
资金
- National Natural Science Foundation of China [U1632266, 11 927 807]
The study conducted spatially resolved measurements of magnon temperature in yttrium iron garnet using the magneto-optic Kerr effect. The results indicate a strong interaction between magnon and phonon subsystems in YIG, with an upper limit of the phonon-magnon thermal relaxation length of 1.4 mm, validating the effectiveness of this method.
Magnon-phonon thermal relaxation holds a fundamental role in condensed matter physics, and the difference between local phonon and magnon temperature Delta T ( mp ) as an important part of this subfield was theoretically considered responsible for the spin Seebeck effect. Experimental determination of Delta T ( mp ) is necessary to give more insight into the magnon-phonon coupling. Here we report spatially resolved measurements of magnon temperature performed by magneto-optic Kerr effect in yttrium iron garnet. Our results indicate a strong interaction between magnon and phonon subsystems in YIG with an upper limit of the phonon-magnon thermal relaxation length of 1.4 mm, and means this method is valid.
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