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Magnetism-mediated thermoelectric performance of the Cr-doped bismuth telluride tetradymite
http://hdl.handle.net/2241/00161175
http://hdl.handle.net/2241/00161175f0df47f7-f2ce-4973-9aba-69821dfa5513
名前 / ファイル | ライセンス | アクション |
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MTP_9-100090 (2.8 MB)
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Item type | Journal Article(1) | |||||||||||
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公開日 | 2020-09-04 | |||||||||||
タイトル | ||||||||||||
言語 | en | |||||||||||
タイトル | Magnetism-mediated thermoelectric performance of the Cr-doped bismuth telluride tetradymite | |||||||||||
言語 | ||||||||||||
言語 | eng | |||||||||||
資源タイプ | ||||||||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||||||||
タイプ | journal article | |||||||||||
著者 |
小林, 伸彦
× 小林, 伸彦
WEKO
204290
× Vaney, J.-B.× Aminorroaya Yamini, S.× Takaki, H.× Kobayashi, K.× Mori, T. |
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抄録 | ||||||||||||
内容記述タイプ | Abstract | |||||||||||
内容記述 | Enhancing the efficiency of thermoelectric materials has been practiced extensively by either improving the power factor or reducing the lattice thermal conductivity. Magnetism, and the magnetic moment–charged carrier interactions, has been suggested to enhance the efficiency of some compounds. Nevertheless, decoupling of the magnetic and the carrier concentration–related effects has never been achieved to prove once and for all, the importance of magnetism in thermoelectricity. Herein, we report improved quality criterion of bismuth telluride upon chromium substitution. The magnetic interactions with the magnetic moment carried by Cr atoms have increased the electrons' effective mass, enhancing the thermopower. Combined with the decrease in the lattice thermal conductivity, the overall performance of these compounds has been enhanced by 25% at constant carrier concentration, an improvement seldom observed. This is a robust enhancement principle because magnetic interactions are effective at high temperatures above the transition temperature, unlike magnon drag which is dependent on ordering and typically a low temperature phenomenon. Our results indicate that taking advantage of such relatively easily implemented magnetic doping effects along with existing strategies can lead to enhanced efficiency of thermoelectric materials. | |||||||||||
書誌情報 |
en : Materials today physics 巻 9, p. 100090, 発行日 2019-06 |
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ISSN | ||||||||||||
収録物識別子タイプ | ISSN | |||||||||||
収録物識別子 | 25425293 | |||||||||||
DOI | ||||||||||||
識別子タイプ | DOI | |||||||||||
関連識別子 | 10.1016/j.mtphys.2019.03.004 | |||||||||||
権利 | ||||||||||||
権利情報 | © 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). | |||||||||||
著者版フラグ | ||||||||||||
値 | publisher | |||||||||||
出版者 | ||||||||||||
出版者 | Elsevier |