Phase-transition-induced giant Thomson effect for thermoelectric cooling

被引:20
|
作者
Modak, Rajkumar [1 ]
Murata, Masayuki [2 ]
Hou, Dazhi [3 ]
Miura, Asuka [1 ]
Iguchi, Ryo [1 ]
Xu, Bin [4 ]
Guo, Rulei [4 ]
Shiomi, Junichiro [4 ]
Sakuraba, Yuya [1 ,5 ]
Uchida, Ken-ichi [1 ,4 ,6 ,7 ]
机构
[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
[2] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan
[3] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, ICQD, Hefei 230026, Anhui, Peoples R China
[4] Univ Tokyo, Dept Mech Engn, Tokyo 1138656, Japan
[5] Japan Sci & Technol Agcy, PRESTO, Saitama 3320012, Japan
[6] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[7] Tohoku Univ, Ctr Spintron Res Network, Sendai, Miyagi 9808577, Japan
来源
APPLIED PHYSICS REVIEWS | 2022年 / 9卷 / 01期
关键词
All Open Access; Hybrid Gold; Green;
D O I
10.1063/5.0077497
中图分类号
O59 [应用物理学];
学科分类号
摘要
The Seebeck and Peltier effects have been widely studied and used in various thermoelectric technologies, including thermal energy harvesting and solid-state heat pumps. However, basic and applied studies on the Thomson effect, another fundamental thermoelectric effect in conductors, are limited despite the fact that the Thomson effect allows electronic cooling through the application of a temperature gradient bias rather than the construction of junction structures. In this article, we report the observation of a giant Thomson effect that appears owing to magnetic phase transitions. The Thomson coefficient of FeRh-based alloys reaches large values approaching -1000 mu V K-1 around room temperature because of the steep temperature dependence of the Seebeck coefficient associated with the antiferromagnetic-ferromagnetic phase transition. The Thomson coefficient is several orders of magnitude larger than the Seebeck coefficient of the alloys. Using the active thermography technique, we demonstrate that the Thomson cooling can be much larger than Joule heating in the same material even in a nearly steady state. The operation temperature of the giant Thomson effect in the FeRh-based alloys can be tuned over a wide range by applying an external magnetic field or by slightly changing the composition. Our findings provide a new direction in the materials science of thermoelectrics and pave the way for thermal management applications using the Thomson effect. (C) 2022 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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页数:9
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