Abstract
Magnetic properties and magnetic entropy change of the NaZn13-type La0.5Pr0.5Fe11.5Si1.5Cx compounds have been investigated. Both the lattice parameter and the Curie temperature increase linearly with increasing carbon concentration. The maximum hysteresis loss at TC reduces remarkably from 94.8J∕kg for x=0to23.1J∕kg for x=0.3 because of the weakening of the itinerant electron metamagnetic transition. However, the magnetic entropy change remains at the large values of 32.4J∕kgK for x=0 and 27.6J∕kgK for x=0.3 under a field change of 0–5T, which implies that a large magnetocaloric effect and a small hysteresis loss have been simultaneously achieved in the La0.5Pr0.5Fe11.5Si1.5Cx carbides.
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