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Universal behavior for magnetic entropy change in magnetocaloric materials: An analysis on the nature of phase transitions

AuthorsBonilla, C. M.; Herrero-Albillos, Julia; Bartolomé, Fernando; García, L. M.; Parra-Borderías, María ; Franco, V.
Issue DateJun-2010
PublisherAmerican Physical Society
CitationPhysical Review B 81(22): 224424 (2010)
AbstractA 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.
Description7 páginas, 5 figuras, 1 tabla.-- PACS number(s): 75.30.Sg, 77.80.B-, 71.20.Eh
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.81.224424
Appears in Collections:(ICMA) Artículos
(ICMS) Artículos
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