Anisotropic magneto-Seebeck effect in the antiferromagnetic semimetal FeGe2

被引：8
|
作者：
Hashizume, Minori [1 ]
Yokouchi, Tomoyuki [1 ,2 ]
Nakagawa, Kurea [2 ]
Shiomi, Yuki [1 ,2 ]
机构：
[1] Univ Tokyo, Dept Integrated Sci, Meguro Ku, Tokyo 1538902, Japan
[2] Univ Tokyo, Dept Basic Sci, Meguro Ku, Tokyo 1538902, Japan
来源：
PHYSICAL REVIEW B | 2021年 / 104卷 / 11期
基金：
日本学术振兴会;
关键词：
DENSITY-WAVE ANTIFERROMAGNETISM; PHASE-DIAGRAM;
D O I：
10.1103/PhysRevB.104.115109
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have investigated thermoelectric properties of the antiferromagnetic semimetal FeGe2. As temperature decreases from 340 K, the Seebeck coefficient takes a maximum around the Ned temperature and then decreases to show a sign change from positive to negative <50 K. When a strong magnetic field is applied perpendicular to the sample plane, the sign change disappears, and the positive Seebeck coefficient is observed in the whole temperature range. This large magneto-Seebeck effect is anisotropic since the Seebeck coefficient is insensitive to in-plane magnetic fields. Based on the Mott formula, we discuss the origins for this anisotropic magneto-Seebeck effect.
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页数：5
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