Unveiling the structure–magnetism interplay in the ferrimagnetic pyrochlore Gd2CrSbO7 with significant cryo–magnetocaloric performance

Silva, R. S.; Rodrigues, J. E.; Santos, C.; Sahle, Ch; Serrano-Sánchez, F.; Andersen, H. L.; Gainza, J.; Skorynina, A.; Biskup Zaja, Nevenko; Nemes, Norbert Marcel; Passamani, E. C.; Martínez, J. L.; Ferreira, N. S.; Alonso, J. A.

Unveiling the structure–magnetism interplay in the ferrimagnetic pyrochlore Gd2CrSbO7 with significant cryo–magnetocaloric performance

Magnetic refrigeration is a promising and efficient cooling technology that uses the magnetocaloric effect (MCE), requiring particular materials with low heat capacity, low ordering temperature, and large magnetic moments for high performance. Here we report on Gd2CrSbO7, a mixed B-site pyrochlore o...

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Autores:	Silva, R. S., Rodrigues, J. E., Santos, C., Sahle, Ch, Serrano-Sánchez, F., Andersen, H. L., Gainza, J., Skorynina, A., Biskup Zaja, Nevenko, Nemes, Norbert Marcel, Passamani, E. C., Martínez, J. L., Ferreira, N. S., Alonso, J. A.
Tipo de recurso:	artículo
Fecha de publicación:	2025
País:	España
Institución:	Universidad Complutense de Madrid (UCM)
Repositorio:	Docta Complutense
Idioma:	inglés
OAI Identifier:	oai:docta.ucm.es:20.500.14352/130826
Acceso en línea:	https://hdl.handle.net/20.500.14352/130826
Access Level:	acceso abierto
Palabra clave:	538.9 537.6 Crystal structure Structure diffraction Refrigeration Física de materiales 2211 Física del Estado Sólido 2211.17 Propiedades Magnéticas

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spelling	Unveiling the structure–magnetism interplay in the ferrimagnetic pyrochlore Gd2CrSbO7 with significant cryo–magnetocaloric performanceSilva, R. S.Rodrigues, J. E.Santos, C.Sahle, ChSerrano-Sánchez, F.Andersen, H. L.Gainza, J.Skorynina, A.Biskup Zaja, NevenkoNemes, Norbert MarcelPassamani, E. C.Martínez, J. L.Ferreira, N. S.Alonso, J. A.538.9537.6Crystal structureStructure diffractionRefrigerationFísica de materiales2211 Física del Estado Sólido2211.17 Propiedades MagnéticasMagnetic refrigeration is a promising and efficient cooling technology that uses the magnetocaloric effect (MCE), requiring particular materials with low heat capacity, low ordering temperature, and large magnetic moments for high performance. Here we report on Gd2CrSbO7, a mixed B-site pyrochlore oxide that exhibits a significant cryogenic MCE, driven by intricate 4f-3 d exchange interactions. Our combined experimental and theoretical investigation reveals that Gd2CrSbO7 crystallizes in a cubic pyrochlore structure (Fd3m) with ferrimagnetic (FiM) ordering, uniquely hosting a Griffiths-like phase and a Schottky anomaly arising from competing Cr-Cr short-range interactions and Gd crystal field effects. X-ray Raman spectroscopy confirms super-exchange interactions, while EXAFS analysis identifies enhanced Sb-O bond rigidity, influencing the material's stability. Notably, Gd2CrSbO7 achieves a remarkable maximum magnetic entropy change of -Delta SMmax\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$-\Delta {S}_{M}<^>{\max}$$\end{document} approximate to 21 J/kg K and refrigerant capacity of RC approximate to 430 J/kg (at 0-7 T), comparable to benchmark cryogenic refrigerants like Gd3Ga5O12, but containing substantially low-priced elements. These findings position Gd2CrSbO7 as a promising platform for next-generation magnetic cooling, while shedding light on emergent magnetic and electronic phenomena in pyrochlore oxides.Nature ResearchUniversidad Complutense de Madrid20252025-12-1420252025-12-14journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/130826reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)InglésengAgencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2021-122477OB-I00 MATERIALES PARA APLICACIONES EN ENERGIA: PNICTUROS, CALCOGENUROS, OXIDOS Y HALUROSAgencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2021-122980OB-C51 ESTUDIOS DE FENOMENOS ATOMISTICOS EN MATERIALES MULTIFUNCIONALES A TRAVES DE TECNICAS IN-SITUAgencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 TED2021-129254B-C21Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 TED2021-129254B-C22open accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/1308262026-06-02T12:44:21Z
dc.title.none.fl_str_mv	Unveiling the structure–magnetism interplay in the ferrimagnetic pyrochlore Gd2CrSbO7 with significant cryo–magnetocaloric performance
title	Unveiling the structure–magnetism interplay in the ferrimagnetic pyrochlore Gd2CrSbO7 with significant cryo–magnetocaloric performance
spellingShingle	Unveiling the structure–magnetism interplay in the ferrimagnetic pyrochlore Gd2CrSbO7 with significant cryo–magnetocaloric performance Silva, R. S. 538.9 537.6 Crystal structure Structure diffraction Refrigeration Física de materiales 2211 Física del Estado Sólido 2211.17 Propiedades Magnéticas
title_short	Unveiling the structure–magnetism interplay in the ferrimagnetic pyrochlore Gd2CrSbO7 with significant cryo–magnetocaloric performance
title_full	Unveiling the structure–magnetism interplay in the ferrimagnetic pyrochlore Gd2CrSbO7 with significant cryo–magnetocaloric performance
title_fullStr	Unveiling the structure–magnetism interplay in the ferrimagnetic pyrochlore Gd2CrSbO7 with significant cryo–magnetocaloric performance
title_full_unstemmed	Unveiling the structure–magnetism interplay in the ferrimagnetic pyrochlore Gd2CrSbO7 with significant cryo–magnetocaloric performance
title_sort	Unveiling the structure–magnetism interplay in the ferrimagnetic pyrochlore Gd2CrSbO7 with significant cryo–magnetocaloric performance
dc.creator.none.fl_str_mv	Silva, R. S. Rodrigues, J. E. Santos, C. Sahle, Ch Serrano-Sánchez, F. Andersen, H. L. Gainza, J. Skorynina, A. Biskup Zaja, Nevenko Nemes, Norbert Marcel Passamani, E. C. Martínez, J. L. Ferreira, N. S. Alonso, J. A.
author	Silva, R. S.
author_facet	Silva, R. S. Rodrigues, J. E. Santos, C. Sahle, Ch Serrano-Sánchez, F. Andersen, H. L. Gainza, J. Skorynina, A. Biskup Zaja, Nevenko Nemes, Norbert Marcel Passamani, E. C. Martínez, J. L. Ferreira, N. S. Alonso, J. A.
author_role	author
author2	Rodrigues, J. E. Santos, C. Sahle, Ch Serrano-Sánchez, F. Andersen, H. L. Gainza, J. Skorynina, A. Biskup Zaja, Nevenko Nemes, Norbert Marcel Passamani, E. C. Martínez, J. L. Ferreira, N. S. Alonso, J. A.
author2_role	author author author author author author author author author author author author author
dc.contributor.none.fl_str_mv	Universidad Complutense de Madrid
dc.subject.none.fl_str_mv	538.9 537.6 Crystal structure Structure diffraction Refrigeration Física de materiales 2211 Física del Estado Sólido 2211.17 Propiedades Magnéticas
topic	538.9 537.6 Crystal structure Structure diffraction Refrigeration Física de materiales 2211 Física del Estado Sólido 2211.17 Propiedades Magnéticas
description	Magnetic refrigeration is a promising and efficient cooling technology that uses the magnetocaloric effect (MCE), requiring particular materials with low heat capacity, low ordering temperature, and large magnetic moments for high performance. Here we report on Gd2CrSbO7, a mixed B-site pyrochlore oxide that exhibits a significant cryogenic MCE, driven by intricate 4f-3 d exchange interactions. Our combined experimental and theoretical investigation reveals that Gd2CrSbO7 crystallizes in a cubic pyrochlore structure (Fd3m) with ferrimagnetic (FiM) ordering, uniquely hosting a Griffiths-like phase and a Schottky anomaly arising from competing Cr-Cr short-range interactions and Gd crystal field effects. X-ray Raman spectroscopy confirms super-exchange interactions, while EXAFS analysis identifies enhanced Sb-O bond rigidity, influencing the material's stability. Notably, Gd2CrSbO7 achieves a remarkable maximum magnetic entropy change of -Delta SMmax\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$-\Delta {S}_{M}<^>{\max}$$\end{document} approximate to 21 J/kg K and refrigerant capacity of RC approximate to 430 J/kg (at 0-7 T), comparable to benchmark cryogenic refrigerants like Gd3Ga5O12, but containing substantially low-priced elements. These findings position Gd2CrSbO7 as a promising platform for next-generation magnetic cooling, while shedding light on emergent magnetic and electronic phenomena in pyrochlore oxides.
publishDate	2025
dc.date.none.fl_str_mv	2025 2025-12-14 2025 2025-12-14
dc.type.none.fl_str_mv	journal article http://purl.org/coar/resource_type/c_6501 VoR http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv	info:eu-repo/semantics/article
format	article
dc.identifier.none.fl_str_mv	https://hdl.handle.net/20.500.14352/130826
url	https://hdl.handle.net/20.500.14352/130826
dc.language.none.fl_str_mv	Inglés eng
language_invalid_str_mv	Inglés
language	eng
dc.relation.none.fl_str_mv	Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2021-122477OB-I00 MATERIALES PARA APLICACIONES EN ENERGIA: PNICTUROS, CALCOGENUROS, OXIDOS Y HALUROS Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2021-122980OB-C51 ESTUDIOS DE FENOMENOS ATOMISTICOS EN MATERIALES MULTIFUNCIONALES A TRAVES DE TECNICAS IN-SITU Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 TED2021-129254B-C21 Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 TED2021-129254B-C22
dc.rights.none.fl_str_mv	open access http://purl.org/coar/access_right/c_abf2 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv	info:eu-repo/semantics/openAccess
rights_invalid_str_mv	open access http://purl.org/coar/access_right/c_abf2 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv	openAccess
dc.format.none.fl_str_mv	application/pdf
dc.publisher.none.fl_str_mv	Nature Research
publisher.none.fl_str_mv	Nature Research
dc.source.none.fl_str_mv	reponame:Docta Complutense instname:Universidad Complutense de Madrid (UCM)
instname_str	Universidad Complutense de Madrid (UCM)
reponame_str	Docta Complutense
collection	Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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Unveiling the structure–magnetism interplay in the ferrimagnetic pyrochlore Gd2CrSbO7 with significant cryo–magnetocaloric performance

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