Direct Measurement of the Magnetocaloric Effect through Time-Dependent Magnetometry
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/36179 |
Resumo: | The magnetocaloric effect of a given material is typically assessed through indirect estimates of the isothermal magnetic entropy change, ΔSM. While estimating the adiabatic temperature difference, ΔTad, is more relevant from the standpoint of refrigeration device engineering, this requires specialized experimental setups. We here present an approach to directly measure ΔTad through time-dependent magnetometry in a commercial superconducting quantum interference device (SQUID) device. We use as reference material gadolinium under a 20-kOe field change, and compare our results with those of the literature. Under nonadiabatic experimental conditions, a remarkably similar ΔTad(T) curve profile is obtained; however, its peak amplitude is underestimated. With a simple compensation methodology we are able to further approximate the profile of the ΔTad(T) curve obtaining the peak amplitude, the maximizing temperature, and the FWHM within relative errors of -4%, -0.7%, and 11%, respectively. Our reported approach makes the measurement of both ΔSM(T) and ΔTad(T) possible with a single instrument, enabling accelerated progress towards new, competitive, and industry-ready materials. |
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Direct Measurement of the Magnetocaloric Effect through Time-Dependent MagnetometryThe magnetocaloric effect of a given material is typically assessed through indirect estimates of the isothermal magnetic entropy change, ΔSM. While estimating the adiabatic temperature difference, ΔTad, is more relevant from the standpoint of refrigeration device engineering, this requires specialized experimental setups. We here present an approach to directly measure ΔTad through time-dependent magnetometry in a commercial superconducting quantum interference device (SQUID) device. We use as reference material gadolinium under a 20-kOe field change, and compare our results with those of the literature. Under nonadiabatic experimental conditions, a remarkably similar ΔTad(T) curve profile is obtained; however, its peak amplitude is underestimated. With a simple compensation methodology we are able to further approximate the profile of the ΔTad(T) curve obtaining the peak amplitude, the maximizing temperature, and the FWHM within relative errors of -4%, -0.7%, and 11%, respectively. Our reported approach makes the measurement of both ΔSM(T) and ΔTad(T) possible with a single instrument, enabling accelerated progress towards new, competitive, and industry-ready materials.American Physical Society2023-02-01T11:59:40Z2022-08-01T00:00:00Z2022-08info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/36179eng2331-701910.1103/PhysRevApplied.18.024081Almeida, R.Amorim, C.Amaral, J. S.Araújo, J. P.Belo, J. H.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T12:09:35Zoai:ria.ua.pt:10773/36179Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:07:00.038024Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Direct Measurement of the Magnetocaloric Effect through Time-Dependent Magnetometry |
title |
Direct Measurement of the Magnetocaloric Effect through Time-Dependent Magnetometry |
spellingShingle |
Direct Measurement of the Magnetocaloric Effect through Time-Dependent Magnetometry Almeida, R. |
title_short |
Direct Measurement of the Magnetocaloric Effect through Time-Dependent Magnetometry |
title_full |
Direct Measurement of the Magnetocaloric Effect through Time-Dependent Magnetometry |
title_fullStr |
Direct Measurement of the Magnetocaloric Effect through Time-Dependent Magnetometry |
title_full_unstemmed |
Direct Measurement of the Magnetocaloric Effect through Time-Dependent Magnetometry |
title_sort |
Direct Measurement of the Magnetocaloric Effect through Time-Dependent Magnetometry |
author |
Almeida, R. |
author_facet |
Almeida, R. Amorim, C. Amaral, J. S. Araújo, J. P. Belo, J. H. |
author_role |
author |
author2 |
Amorim, C. Amaral, J. S. Araújo, J. P. Belo, J. H. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Almeida, R. Amorim, C. Amaral, J. S. Araújo, J. P. Belo, J. H. |
description |
The magnetocaloric effect of a given material is typically assessed through indirect estimates of the isothermal magnetic entropy change, ΔSM. While estimating the adiabatic temperature difference, ΔTad, is more relevant from the standpoint of refrigeration device engineering, this requires specialized experimental setups. We here present an approach to directly measure ΔTad through time-dependent magnetometry in a commercial superconducting quantum interference device (SQUID) device. We use as reference material gadolinium under a 20-kOe field change, and compare our results with those of the literature. Under nonadiabatic experimental conditions, a remarkably similar ΔTad(T) curve profile is obtained; however, its peak amplitude is underestimated. With a simple compensation methodology we are able to further approximate the profile of the ΔTad(T) curve obtaining the peak amplitude, the maximizing temperature, and the FWHM within relative errors of -4%, -0.7%, and 11%, respectively. Our reported approach makes the measurement of both ΔSM(T) and ΔTad(T) possible with a single instrument, enabling accelerated progress towards new, competitive, and industry-ready materials. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-08-01T00:00:00Z 2022-08 2023-02-01T11:59:40Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10773/36179 |
url |
http://hdl.handle.net/10773/36179 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2331-7019 10.1103/PhysRevApplied.18.024081 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
American Physical Society |
publisher.none.fl_str_mv |
American Physical Society |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799137725647945728 |