Double exchange Entropy Magnetic refrigeration Magnetocaloric effect Perovskite
Issue Date:
2003
Publisher:
Journal of Magnetism and Magnetic Materials
Citation:
Volume 258-259, Page 309-311
Abstract:
A large magnetic-entropy change ??SM associated with the ferromagnetic-paramagnetic transition
in CMR materials (La0.65Sr0.35MnO3, La0.6Sr0.2Ca0.2MnO3, La0.6Sr0.2Ba0.2MnO3 and La0.7Ca0.06
Ba0.24MnO3) has been observed. It is shown that the ??SM reaches a maximum value of 2.26J/kg/K for La
0.6Sr0.2Ba0.2MnO3 composition at Curie temperature of 354 K, upon 10 kOe applied field variation. Due
to the large ??SM and high Curie temperature, these CMR materials are suggested to use as active magnetic
refrigerants for magnetic refrigeration technology above room temperature. ?? 2002 Elsevier Science B.V.
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