Magnetic moment impact on spin-dependent Seebeck coefficient of ferromagnetic thin films

Magnetic materials may be engineered to produce thermoelectric materials using spin-related effects. However, clear understanding of localized magnetic moments (µ(I)), free carriers, and Seebeck coefficient (S) interrelations is mandatory for efficient material design. In this work, we investigate µ...

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Autores principales: Portavoce, Alain, Assaf, Elie, Bertoglio, Maxime, Narducci, Dario, Bertaina, Sylvain
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9813267/
https://www.ncbi.nlm.nih.gov/pubmed/36599898
http://dx.doi.org/10.1038/s41598-022-26993-3
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author Portavoce, Alain
Assaf, Elie
Bertoglio, Maxime
Narducci, Dario
Bertaina, Sylvain
author_facet Portavoce, Alain
Assaf, Elie
Bertoglio, Maxime
Narducci, Dario
Bertaina, Sylvain
author_sort Portavoce, Alain
collection PubMed
description Magnetic materials may be engineered to produce thermoelectric materials using spin-related effects. However, clear understanding of localized magnetic moments (µ(I)), free carriers, and Seebeck coefficient (S) interrelations is mandatory for efficient material design. In this work, we investigate µ(I) influence on the spin-dependent S of model ferromagnetic thin films, allowing µ(I) thermal fluctuations, ordering, and density variation influence to be independently investigated. µ(I) influence on free carrier polarization is found to be of highest importance on S: efficient coupling of free carrier spin and localized magnetic moment promotes the increase of S, while spin-dependent relaxation time difference between the two spin-dependent conduction channels leads to S decrease. Our observations support new routes for thermoelectric material design based on spin-related effects in ferromagnetic materials.
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spelling pubmed-98132672023-01-06 Magnetic moment impact on spin-dependent Seebeck coefficient of ferromagnetic thin films Portavoce, Alain Assaf, Elie Bertoglio, Maxime Narducci, Dario Bertaina, Sylvain Sci Rep Article Magnetic materials may be engineered to produce thermoelectric materials using spin-related effects. However, clear understanding of localized magnetic moments (µ(I)), free carriers, and Seebeck coefficient (S) interrelations is mandatory for efficient material design. In this work, we investigate µ(I) influence on the spin-dependent S of model ferromagnetic thin films, allowing µ(I) thermal fluctuations, ordering, and density variation influence to be independently investigated. µ(I) influence on free carrier polarization is found to be of highest importance on S: efficient coupling of free carrier spin and localized magnetic moment promotes the increase of S, while spin-dependent relaxation time difference between the two spin-dependent conduction channels leads to S decrease. Our observations support new routes for thermoelectric material design based on spin-related effects in ferromagnetic materials. Nature Publishing Group UK 2023-01-04 /pmc/articles/PMC9813267/ /pubmed/36599898 http://dx.doi.org/10.1038/s41598-022-26993-3 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Portavoce, Alain
Assaf, Elie
Bertoglio, Maxime
Narducci, Dario
Bertaina, Sylvain
Magnetic moment impact on spin-dependent Seebeck coefficient of ferromagnetic thin films
title Magnetic moment impact on spin-dependent Seebeck coefficient of ferromagnetic thin films
title_full Magnetic moment impact on spin-dependent Seebeck coefficient of ferromagnetic thin films
title_fullStr Magnetic moment impact on spin-dependent Seebeck coefficient of ferromagnetic thin films
title_full_unstemmed Magnetic moment impact on spin-dependent Seebeck coefficient of ferromagnetic thin films
title_short Magnetic moment impact on spin-dependent Seebeck coefficient of ferromagnetic thin films
title_sort magnetic moment impact on spin-dependent seebeck coefficient of ferromagnetic thin films
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9813267/
https://www.ncbi.nlm.nih.gov/pubmed/36599898
http://dx.doi.org/10.1038/s41598-022-26993-3
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