Spin Seebeck effect in the layered ferromagnetic insulators CrSiTe3 and CrGeTe3

被引：55

作者：

Ito, Naohiro ^{[1
]}

Kikkawa, Takashi ^{[1
,2
]}

Barker, Joseph ^{[1
,3
]}

Hirobe, Daichi ^{[1
,8
]}

Shiomi, Yuki ^{[4
]}

Saitoh, Eiji ^{[1
,2
,5
,6
,7
]}

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[2] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan

[3] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England

[4] Univ Tokyo, Dept Basic Sci, Tokyo 1538902, Japan

[5] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[6] Tohoku Univ, Ctr Spintron Res Network, Sendai, Miyagi 9808577, Japan

[7] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[8] Inst Mol Sci, Okazaki, Aichi 4448585, Japan

来源：

PHYSICAL REVIEW B | 2019年 / 100卷 / 06期

关键词：

CRYSTAL-STRUCTURE; CR2SI2TE6; COMPOUND;

D O I：

10.1103/PhysRevB.100.060402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the longitudinal spin Seebeck effect (LSSE) in the layered ferromagnetic insulators CrSiTe3 and CrGeTe3 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 Y3Fe5O12, persists above the critical temperatures in both CrSiTe3/Pt and CrGeTe3/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.

引用

页数：6

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