Journal
ACTA MATERIALIA
Volume 231, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2022.117869
Keywords
Phase transformation; Interfacial misfit; Gibbs energy; Magnetic properties; La(Fe,Si)(13) based compound
Funding
- project CoolMagEvo from the program Energy clean, safe and efficient of the French National Research Agency [ANR-17-CE05-0036]
- National Natural Science Foundation of China [51961033, 52150610486]
- Agence Nationale de la Recherche (ANR) [ANR-17-CE05-0036] Funding Source: Agence Nationale de la Recherche (ANR)
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This article presents a thermodynamic model to explain the two-step response of magnetic refrigeration materials during transformation. The accuracy of the model is validated by comparing it with experimental data.
The most promising materials for applications in magnetic refrigeration exhibit a large entropy change at a first-order ferromagnetic transition. Often, it has been observed that the transformation proceeds via two bursts surrounding a regime of slow transformation. Within a simplified framework, the present article reports on a thermodynamic model able to account for this two-steps response. This model is con -fronted to magnetic and calorimetric data recorded in the magnetocaloric compound LaFe11.4Si1.31Co0.29. (C) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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