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arXiv 2101.08443cond-mat.mtrl-sci
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磁/热电混合系统横向温差发电与冷却性能的唯象分析

Phenomenological analysis of transverse thermoelectric generation and cooling performance in magnetic/thermoelectric hybrid systems

Kaoru Yamamoto, Ryo Iguchi, Asuka Miura, Weinan Zhou, Yuya Sakuraba, Yoshio Miura, Ken-ichi Uchida

摘要:

我们唯象地计算最近观察到的塞贝克驱动的横向热电发电(STTG)的热功率,功率因数和品质因数方面的各种系统的性能,以证明STTG的有用性。STTG系统由闭合电路组成,该闭合电路包括分别表现出塞贝克效应和反常霍尔效应的热电材料和磁性材料。当温度梯度施加到混合系统时,热电材料层中的塞贝克效应在闭合电路中产生纵向充电电流,并且充电电流随后驱动磁性材料层中的反常霍尔效应。由塞贝克效应驱动的反常霍尔电压具有与基于反常能斯特效应的横向热电转换相似的对称性。我们发现,STTG的热电性能可以远远优于那些反常能斯特效应,通过增加塞贝克系数和反常霍尔角的热电和磁性材料,分别,以及通过优化它们的尺寸。我们还制定了电子冷却的STTG系统中的性能,确定的倒数关系的混合横向热电转换。

英文摘要:

We phenomenologically calculate the performance of the recently-observed Seebeck-driven transverse thermoelectric generation (STTG) for various systems in terms of the thermopower, power factor, and figure of merit to demonstrate the usefulness of STTG. The STTG system consists of a closed circuit comprising thermoelectric and magnetic materials which exhibit the Seebeck and anomalous Hall effects, respectively. When a temperature gradient is applied to the hybrid system, the Seebeck effect in the thermoelectric material layer generates a longitudinal charge current in the closed circuit and the charge current subsequently drives the anomalous Hall effect in the magnetic material layer. The anomalous Hall voltage driven by the Seebeck effect has a similar symmetry to the transverse thermoelectric conversion based on the anomalous Nernst effect. We find that the thermoelectric properties of STTG can be much better than those of the anomalous Nernst effect by increasing the Seebeck coefficient and anomalous Hall angle of the thermoelectric and magnetic materials, respectively, as well as by optimizing their dimensions. We also formulate the electronic cooling performance in the STTG system, confirming the reciprocal relation for the hybrid transverse thermoelectric conversion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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