Thickness dependence of spin Peltier effect visualized by thermal imaging technique

Daimon, Shunsuke*; Uchida, Kenichi*; Ujiie, Naomi*; Hattori, Yasuyuki*; Tsuboi, Rei*; Saito, Eiji

Magnon propagation length in a ferrimagnetic insulator yttrium iron garnet (YIG) has been investigated by measuring and analyzing the YIG-thickness $t_mathrm{YIG}$ dependence of the spin Peltier effect (SPE) in a Pt/YIG junction system. By means of the lock-in thermography technique, we measured the spatial distribution of the SPE-induced temperature modulation in the Pt/YIG system with the $t_mathrm{YIG}$ gradation, allowing us to obtain the accurate $t_mathrm{YIG}$ dependence of SPE with high $t_mathrm{YIG}$ resolution. Based on the $t_mathrm{YIG}$ dependence of SPE, we verified the applicability of several phenomenological models to estimate the magnon diffusion length in YIG.

Language	:	English
Journal	:	Applied Physics Express
Volume	:	13
Number	:	10
Pages	:	p.103001_1 - 103001_4
Publication Year/Month	:	2020/10
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Paper URL	:	https://doi.org/10.35848/1882-0786/abb2b5
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Keywords	:	スピンペルチェ効果; サーモグラフィー; 膜厚依存性
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Registration No. : AA20220595
JAEA Abstracts No. : 50001161
Paper Submission No. : 25915

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