Magnetocaloric effect in melt-spun FePd ribbon alloy with second order phase transition |
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Authors: | V.M. Prida,V. FrancoV. Vega,J.L. Sá nchez-LlamazaresJ.J. Suñ ol,A. CondeB. Hernando |
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Affiliation: | a Depto. Física, Universidad de Oviedo, Calvo Sotelo s/n, 33007 Oviedo, Asturias, Spain b Depto. Física Materia Condensada, ICMSE-CSIC, Universidad de Sevilla, 41080 Sevilla, Spain c Servicios Científico-Técnicos, Universidad de Oviedo, J. Claveria 8, 33006 Oviedo, Asturias, Spain d Universidad de Girona, Campus Montilivi, Lluís Santaló s/n, 17003 Girona, Spain |
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Abstract: | Magnetic entropy change and refrigerant capacity for an applied magnetic field variation of 1.5 T have been determined in the temperature range of 293-700 K for the as-quenched polycrystalline Fe73.2Pd26.8 melt-spun ribbons alloy. Samples show a major magnetic phase with the fct crystal structure and a Curie temperature of 553 K, at which a second order magnetic phase transition occurs. A maximum magnetic entropy change of 1.04 J kg−1 K−1 was achieved at 550 K, while the maximum refrigerant capacity of 108 J/kg is attained at the applied field of 1.5 T. The field dependence of the magnetic entropy change for this material follows the phenomenological universal curve and at the temperature of the peak corresponds to a large field independent exponent of n = 0.84. Extrapolated value of field depending RCArea at 5 T reach above 300 J/kg, which is comparable to that of some of the best-known Fe-doped GdSiGe coolant compounds. |
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Keywords: | FePd alloy Melt spun ribbon Magnetocaloric effect Magnetic entropy change Refrigerant capacity |
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