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 finding makes a connection between permanent magnets and thermal energy engineering, providing the basis for creating “thermoelectric permanent magnets.”
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Observation of anomalous Ettingshausen effect and large transverse thermoelectric conductivity in permanent magnets
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25 November 2019
Research Article|
November 26 2019
Observation of anomalous Ettingshausen effect and large transverse thermoelectric conductivity in permanent magnets
Asuka Miura;
Asuka Miura
1
Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science
, Tsukuba 305-0047, Japan
2
Department of Mechanical Engineering, The University of Tokyo
, Tokyo 113-8656, Japan
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Hossein Sepehri-Amin
;
Hossein Sepehri-Amin
1
Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science
, Tsukuba 305-0047, Japan
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Keisuke Masuda
;
Keisuke Masuda
1
Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science
, Tsukuba 305-0047, Japan
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Hiroki Tsuchiura;
Hiroki Tsuchiura
3
Department of Applied Physics, Tohoku University
, Sendai 980-8579, Japan
4
Center for Spintronics Research Network, Tohoku University
, Sendai 980-8577, Japan
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Yoshio Miura;
Yoshio Miura
1
Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science
, Tsukuba 305-0047, Japan
5
Center for Spintronics Research Network, Osaka University
, Osaka 560-8531, Japan
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Ryo Iguchi
;
Ryo Iguchi
1
Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science
, Tsukuba 305-0047, Japan
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Yuya Sakuraba;
Yuya Sakuraba
1
Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science
, Tsukuba 305-0047, Japan
6
PRESTO, Japan Science and Technology Agency
, Saitama 332-0012, Japan
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Junichiro Shiomi
;
Junichiro Shiomi
2
Department of Mechanical Engineering, The University of Tokyo
, Tokyo 113-8656, Japan
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Kazuhiro Hono
;
Kazuhiro Hono
1
Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science
, Tsukuba 305-0047, Japan
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Ken-ichi Uchida
Ken-ichi Uchida
a)
1
Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science
, Tsukuba 305-0047, Japan
2
Department of Mechanical Engineering, The University of Tokyo
, Tokyo 113-8656, Japan
4
Center for Spintronics Research Network, Tohoku University
, Sendai 980-8577, Japan
7
Institute for Materials Research, Tohoku University
, Sendai 980-8577, Japan
a)Author to whom correspondence should be addressed: [email protected]
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Asuka Miura
1,2
Hossein Sepehri-Amin
1
Keisuke Masuda
1
Hiroki Tsuchiura
3,4
Yoshio Miura
1,5
Ryo Iguchi
1
Yuya Sakuraba
1,6
Junichiro Shiomi
2
Kazuhiro Hono
1
Ken-ichi Uchida
1,2,4,7,a)
1
Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science
, Tsukuba 305-0047, Japan
2
Department of Mechanical Engineering, The University of Tokyo
, Tokyo 113-8656, Japan
3
Department of Applied Physics, Tohoku University
, Sendai 980-8579, Japan
4
Center for Spintronics Research Network, Tohoku University
, Sendai 980-8577, Japan
5
Center for Spintronics Research Network, Osaka University
, Osaka 560-8531, Japan
6
PRESTO, Japan Science and Technology Agency
, Saitama 332-0012, Japan
7
Institute for Materials Research, Tohoku University
, Sendai 980-8577, Japan
a)Author to whom correspondence should be addressed: [email protected]
Appl. Phys. Lett. 115, 222403 (2019)
Article history
Received:
October 08 2019
Accepted:
November 12 2019
Citation
Asuka Miura, Hossein Sepehri-Amin, Keisuke Masuda, Hiroki Tsuchiura, Yoshio Miura, Ryo Iguchi, Yuya Sakuraba, Junichiro Shiomi, Kazuhiro Hono, Ken-ichi Uchida; Observation of anomalous Ettingshausen effect and large transverse thermoelectric conductivity in permanent magnets. Appl. Phys. Lett. 25 November 2019; 115 (22): 222403. https://doi.org/10.1063/1.5131001
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