Anisotropic magneto-Seebeck effect in the antiferromagnetic semimetal FeGe2
Anisotropic magneto-Seebeck effect in the antiferromagnetic semimetal FeGe2
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DOI：
10.1103/physrevb.104.115109
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发表时间：
2021-09
影响因子：
3.7
通讯作者：
M. Hashizume;T. Yokouchi;Kurea Nakagawa;Y. Shiomi
中科院分区：
文献类型：
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作者：
M. Hashizume;T. Yokouchi;Kurea Nakagawa;Y. Shiomi
我们研究了反铁磁性半金属的热电性质。当温度从340 K开始下降时，塞贝克系数在nsamel温度附近达到最大值，然后减小，在<50 K时呈现由正到负的符号变化。当垂直于样品平面施加强磁场时，符号变化消失，整个温度范围内塞贝克系数均为正。这种大的磁-塞贝克效应是各向异性的，因为塞贝克系数对面内磁场不敏感。基于Mott公式，讨论了各向异性磁-塞贝克效应的成因。
We have investigated thermoelectric properties of the antiferromagnetic semimetal. As temperature decreases from 340 K, the Seebeck coefficient takes a maximum around the Néel 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.