Spin Seebeck effect in the layered ferromagnetic insulators CrSiTe and CrGeTe

Ito, Naohiro*; Kikkawa, Takashi*; Barker, J.*; Hirobe, Daichi*; Shiomi, Yuki*; Saito, Eiji

We have studied the longitudinal spin Seebeck effect (LSSE) in the layered ferromagnetic insulators CrSiTe and CrGeTe covered by Pt films in the measurement configuration where spin current traverses the ferromagnetic Cr layers. The LSSE response is clearly observed in the ferromagnetic phase and, in contrast to a standard LSSE magnet YFeO $_{12}$ , persists above the critical temperatures in both CrSiTe/Pt and CrGeTe/Pt samples. With the help of a numerical calculation, we attribute the LSSE signals observed in the paramagnetic regime to exchange-dominated interlayer transport of in-plane paramagnetic moments reinforced by short-range ferromagnetic correlations and strong Zeeman effects.

Language	:	English
Journal	:	Physical Review B
Volume	:	100
Number	:	6
Pages	:	p.060402_1 - 060402_6
Publication Year/Month	:	2019/08
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Paper URL	:	https://doi.org/10.1103/PhysRevB.100.060402
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Keywords	:	強磁性絶縁体; スピンゼーベック効果; 短距離磁気相関
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Registration No. : AA20220573
JAEA Abstracts No. :
Paper Submission No. : 25948

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