Cross-coupling contribution to the isothermal entropy change in multicaloric materials
Multiferroic materials with strong coupling between different degrees of freedom are prone to exhibit giant multicaloric effects resulting from the application or removal of diverse external fields. These materials exhibit a synergic response to the combined action of two fields when the monocaloric...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | JPhys Energy |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2515-7655/acc6ef |
| _version_ | 1797834765751025664 |
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| author | Lluís Mañosa Enric Stern-Taulats Adrià Gràcia-Condal Antoni Planes |
| author_facet | Lluís Mañosa Enric Stern-Taulats Adrià Gràcia-Condal Antoni Planes |
| author_sort | Lluís Mañosa |
| collection | DOAJ |
| description | Multiferroic materials with strong coupling between different degrees of freedom are prone to exhibit giant multicaloric effects resulting from the application or removal of diverse external fields. These materials exhibit a synergic response to the combined action of two fields when the monocaloric effects are both conventional (or both inverse), while a non-synergic response occurs when one of the monocaloric effects is conventional and the other is inverse. In all cases, the multicaloric properties (isothermal entropy and adiabatic temperature changes) do not result from the simple addition of the corresponding monocaloric quantities because there is a contribution from the interplay between degrees of freedom (cross-coupling term). In this paper, we analyse in detail the contribution of the cross-coupling term to the multicaloric entropy values obtained for both synergic and non-synergic multicaloric materials. We first introduce basic thermodynamic concepts accounting for the multicaloric effects, and next the contribution from the cross-coupling term is illustrated via several model examples. We finally analyse the realistic situation for two prototype materials with synergic and non-synergic multicaloric effects. |
| first_indexed | 2024-04-09T14:42:45Z |
| format | Article |
| id | doaj.art-c26db6891b354ad9a2d392fde3666188 |
| institution | Directory Open Access Journal |
| issn | 2515-7655 |
| language | English |
| last_indexed | 2024-04-09T14:42:45Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | JPhys Energy |
| spelling | doaj.art-c26db6891b354ad9a2d392fde36661882023-05-03T05:07:33ZengIOP PublishingJPhys Energy2515-76552023-01-015202401610.1088/2515-7655/acc6efCross-coupling contribution to the isothermal entropy change in multicaloric materialsLluís Mañosa0https://orcid.org/0000-0002-1182-2670Enric Stern-Taulats1https://orcid.org/0000-0002-1562-8218Adrià Gràcia-Condal2Antoni Planes3https://orcid.org/0000-0001-5213-5714Departament de Física de la Matèria Condensada, Facultat de Física, Martí i Franquès 1, Universitat de Barcelona , 08028 Barcelona, CataloniaDepartament de Física de la Matèria Condensada, Facultat de Física, Martí i Franquès 1, Universitat de Barcelona , 08028 Barcelona, CataloniaDepartament de Física de la Matèria Condensada, Facultat de Física, Martí i Franquès 1, Universitat de Barcelona , 08028 Barcelona, Catalonia; CELLS-ALBA Synchrotron , 08290 Cerdanyola del Vallès, CataloniaDepartament de Física de la Matèria Condensada, Facultat de Física, Martí i Franquès 1, Universitat de Barcelona , 08028 Barcelona, CataloniaMultiferroic materials with strong coupling between different degrees of freedom are prone to exhibit giant multicaloric effects resulting from the application or removal of diverse external fields. These materials exhibit a synergic response to the combined action of two fields when the monocaloric effects are both conventional (or both inverse), while a non-synergic response occurs when one of the monocaloric effects is conventional and the other is inverse. In all cases, the multicaloric properties (isothermal entropy and adiabatic temperature changes) do not result from the simple addition of the corresponding monocaloric quantities because there is a contribution from the interplay between degrees of freedom (cross-coupling term). In this paper, we analyse in detail the contribution of the cross-coupling term to the multicaloric entropy values obtained for both synergic and non-synergic multicaloric materials. We first introduce basic thermodynamic concepts accounting for the multicaloric effects, and next the contribution from the cross-coupling term is illustrated via several model examples. We finally analyse the realistic situation for two prototype materials with synergic and non-synergic multicaloric effects.https://doi.org/10.1088/2515-7655/acc6efmulticaloricmagnetocaloricbarocaloricelastocaloric |
| spellingShingle | Lluís Mañosa Enric Stern-Taulats Adrià Gràcia-Condal Antoni Planes Cross-coupling contribution to the isothermal entropy change in multicaloric materials JPhys Energy multicaloric magnetocaloric barocaloric elastocaloric |
| title | Cross-coupling contribution to the isothermal entropy change in multicaloric materials |
| title_full | Cross-coupling contribution to the isothermal entropy change in multicaloric materials |
| title_fullStr | Cross-coupling contribution to the isothermal entropy change in multicaloric materials |
| title_full_unstemmed | Cross-coupling contribution to the isothermal entropy change in multicaloric materials |
| title_short | Cross-coupling contribution to the isothermal entropy change in multicaloric materials |
| title_sort | cross coupling contribution to the isothermal entropy change in multicaloric materials |
| topic | multicaloric magnetocaloric barocaloric elastocaloric |
| url | https://doi.org/10.1088/2515-7655/acc6ef |
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