Observation of anomalous Ettingshausen effect and large transverse thermoelectric conductivity in permanent magnets
Observation of anomalous Ettingshausen effect and large transverse thermoelectric conductivity in permanent magnets
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DOI：
10.1063/1.5131001
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发表时间：
2019-11-25
影响因子：
4
通讯作者：
Uchida, Ken-ichi
中科院分区：
文献类型：
--
作者：
Miura, Asuka;Sepehri-Amin, Hossein;Uchida, Ken-ichi
这项研究的重点是作为热电转换器的永磁体的潜力。结果表明，SmCo5型磁体在室温下具有较大的反常Ettingshausen效应（AEE），其荷热电流转换系数比典型的铁磁金属大一个数量级以上.在实际使用的各种永磁体中，大的AEE是SmCo5型磁体的独有特征，这与基于静态磁性能的磁体的常规性能无关。实验结果表明，大的AEE来源于SmCo5的本征横向热电导。这一发现将永磁体和热能工程联系起来，为创造“热电永磁体”提供了基础。由AIP Publishing授权出版。
This study focuses on the potential of permanent magnets as thermoelectric converters. It is found that a SmCo5-type magnet exhibits a large anomalous Ettingshausen effect (AEE) at room temperature and that its charge-to-heat current conversion coefficient is more than one order of magnitude greater than that of typical ferromagnetic metals. The large AEE is an exclusive feature of the SmCo5-type magnet among various permanent magnets in practical use, which is independent of the conventional performance of magnets based on static magnetic properties. The experimental results show that the large AEE originates from the intrinsic transverse thermoelectric conductivity of SmCo5. This findingmakes a connection between permanent magnets and thermal energy engineering, providing the basis for creating "thermoelectric permanent magnets." Published under license by AIP Publishing.