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説明:

Heat-to-charge conversion efficiency of thermoelectric materials is closely linked to the entropy per charge carrier. Thus, magnetic materials are promising building blocks for highly efficient energy harvesters, as their carrier entropy is boosted by a spin degree of freedom. In this work, we investigate how this spin-entropy impacts heat-to-charge conversion in A-type antiferromagnet CrSBr. We perform simultaneous measurements of electrical conductance and thermocurrent while changing magnetic order using temperature and magnetic field as tuning parameters. We find a strong enhancement of the thermoelectric power factor around the Néel temperature. We further reveal that the power factor at low temperature can be increased by up to 600% upon applying a magnetic field. Our results demonstrate that the thermoelectric properties of 2D magnets can be optimized by exploiting the sizeable impact of spin-entropy and confirm thermoelectric measurements as a sensitive tool to investigate subtle magnetic phase transitions in low-dimensional magnets.

権利情報:

• In Copyright
  This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © 2024 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.nanolett.4c00809.

キーワード: 2D magnetism, CrSBr, Thermoelectric, Entropy

刊行年月日: 2024-06-05

出版者: American Chemical Society (ACS)

掲載誌:

• Nano Letters (ISSN: 15306984) vol. 24 issue. 22 p. 6513-6520

研究助成金:

• European Research Council ERC-StG-10104144-MOUNTAIN
• Ministry of Education, Culture, Sports, Science and Technology
• F?d?ration Wallonie-Bruxelles 21/26-116
• Deutsche Forschungsgemeinschaft BU 1125/11-1
• H2020 Future and Emerging Technologies 767187
• Fonds Wetenschappelijk Onderzoek 40007563
• Japan Society for the Promotion of Science 21H05233
• Japan Society for the Promotion of Science 23H02052
• National Institute for Materials Science
• Fonds De La Recherche Scientifique - FNRS 40007563
• Fonds De La Recherche Scientifique - FNRS FNRS-CDR-J.0068.21-SMARD
• Fonds De La Recherche Scientifique - FNRS FNRS-CQ-1.C044.21- SMARD
• Fonds De La Recherche Scientifique - FNRS FNRS-MIS-F.4523.22-TopoBrain
• Division of Materials Research DMR-2011738
• Nederlandse Organisatie voor Wetenschappelijk Onderzoek

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI:

公開URL: https://doi.org/10.1021/acs.nanolett.4c00809

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更新時刻: 2025-07-29 12:30:30 +0900

MDRでの公開時刻: 2025-07-29 12:21:25 +0900