Cargando…
A quantitative criterion for determining the order of magnetic phase transitions using the magnetocaloric effect
The ideal magnetocaloric material would lay at the borderline of a first-order and a second-order phase transition. Hence, it is crucial to unambiguously determine the order of phase transitions for both applied magnetocaloric research as well as the characterization of other phase change materials....
Autores principales: | , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6041331/ https://www.ncbi.nlm.nih.gov/pubmed/29992958 http://dx.doi.org/10.1038/s41467-018-05111-w |
_version_ | 1783338971797913600 |
---|---|
author | Law, Jia Yan Franco, Victorino Moreno-Ramírez, Luis Miguel Conde, Alejandro Karpenkov, Dmitriy Y. Radulov, Iliya Skokov, Konstantin P. Gutfleisch, Oliver |
author_facet | Law, Jia Yan Franco, Victorino Moreno-Ramírez, Luis Miguel Conde, Alejandro Karpenkov, Dmitriy Y. Radulov, Iliya Skokov, Konstantin P. Gutfleisch, Oliver |
author_sort | Law, Jia Yan |
collection | PubMed |
description | The ideal magnetocaloric material would lay at the borderline of a first-order and a second-order phase transition. Hence, it is crucial to unambiguously determine the order of phase transitions for both applied magnetocaloric research as well as the characterization of other phase change materials. Although Ehrenfest provided a conceptually simple definition of the order of a phase transition, the known techniques for its determination based on magnetic measurements either provide erroneous results for specific cases or require extensive data analysis that depends on subjective appreciations of qualitative features of the data. Here we report a quantitative fingerprint of first-order thermomagnetic phase transitions: the exponent n from field dependence of magnetic entropy change presents a maximum of n > 2 only for first-order thermomagnetic phase transitions. This model-independent parameter allows evaluating the order of phase transition without any subjective interpretations, as we show for different types of materials and for the Bean–Rodbell model. |
format | Online Article Text |
id | pubmed-6041331 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-60413312018-07-13 A quantitative criterion for determining the order of magnetic phase transitions using the magnetocaloric effect Law, Jia Yan Franco, Victorino Moreno-Ramírez, Luis Miguel Conde, Alejandro Karpenkov, Dmitriy Y. Radulov, Iliya Skokov, Konstantin P. Gutfleisch, Oliver Nat Commun Article The ideal magnetocaloric material would lay at the borderline of a first-order and a second-order phase transition. Hence, it is crucial to unambiguously determine the order of phase transitions for both applied magnetocaloric research as well as the characterization of other phase change materials. Although Ehrenfest provided a conceptually simple definition of the order of a phase transition, the known techniques for its determination based on magnetic measurements either provide erroneous results for specific cases or require extensive data analysis that depends on subjective appreciations of qualitative features of the data. Here we report a quantitative fingerprint of first-order thermomagnetic phase transitions: the exponent n from field dependence of magnetic entropy change presents a maximum of n > 2 only for first-order thermomagnetic phase transitions. This model-independent parameter allows evaluating the order of phase transition without any subjective interpretations, as we show for different types of materials and for the Bean–Rodbell model. Nature Publishing Group UK 2018-07-11 /pmc/articles/PMC6041331/ /pubmed/29992958 http://dx.doi.org/10.1038/s41467-018-05111-w Text en © The Author(s) 2018 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Law, Jia Yan Franco, Victorino Moreno-Ramírez, Luis Miguel Conde, Alejandro Karpenkov, Dmitriy Y. Radulov, Iliya Skokov, Konstantin P. Gutfleisch, Oliver A quantitative criterion for determining the order of magnetic phase transitions using the magnetocaloric effect |
title | A quantitative criterion for determining the order of magnetic phase transitions using the magnetocaloric effect |
title_full | A quantitative criterion for determining the order of magnetic phase transitions using the magnetocaloric effect |
title_fullStr | A quantitative criterion for determining the order of magnetic phase transitions using the magnetocaloric effect |
title_full_unstemmed | A quantitative criterion for determining the order of magnetic phase transitions using the magnetocaloric effect |
title_short | A quantitative criterion for determining the order of magnetic phase transitions using the magnetocaloric effect |
title_sort | quantitative criterion for determining the order of magnetic phase transitions using the magnetocaloric effect |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6041331/ https://www.ncbi.nlm.nih.gov/pubmed/29992958 http://dx.doi.org/10.1038/s41467-018-05111-w |
work_keys_str_mv | AT lawjiayan aquantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect AT francovictorino aquantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect AT morenoramirezluismiguel aquantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect AT condealejandro aquantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect AT karpenkovdmitriyy aquantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect AT raduloviliya aquantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect AT skokovkonstantinp aquantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect AT gutfleischoliver aquantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect AT lawjiayan quantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect AT francovictorino quantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect AT morenoramirezluismiguel quantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect AT condealejandro quantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect AT karpenkovdmitriyy quantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect AT raduloviliya quantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect AT skokovkonstantinp quantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect AT gutfleischoliver quantitativecriterionfordeterminingtheorderofmagneticphasetransitionsusingthemagnetocaloriceffect |