Article
Universal behavior for magnetic entropy change in magnetocaloric materials: An analysis on the nature of phase transitions
Author/s | Franco García, Victorino
Bonilla, Claudia Marcela Herrero Albillos, Julia |
Department | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Publication Date | 2010-06-16 |
Deposit Date | 2016-02-01 |
Published in |
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Abstract | A universal curve for the change in the magnetic entropy has been recently proposed for materials with second-order phase transitions. In this work we have studied the universal behavior of the magnetocaloric effect in the ... A universal curve for the change in the magnetic entropy has been recently proposed for materials with second-order phase transitions. In this work we have studied the universal behavior of the magnetocaloric effect in the family of cobalt Laves phases, RCo2, and mixed manganites, La2/3(CaxSr(1−x))1/3MnO3, which exhibit first- and second-order phase transitions. The rescaled magnetic entropy change curves for different applied fields collapse onto a single curve for materials with second-order phase transition as opposed to the first-order phase transition compounds, for which this collapse does not hold. This result suggests that the universal curve may be used as a further criterion to distinguish the order of the phase transition. |
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