期刊
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷 90, 期 2, 页码 237-241出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-007-4309-x
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La0.7Ca0.3MnO3 samples were prepared in nano- and polycrystalline forms by the sol-gel and solid state reaction methods, respectively, and structurally characterized by synchrotron X-ray diffraction. The magnetic properties determined by ac susceptibility and dc magnetization measurements are discussed. The magnetocaloric effect in this nanocrystalline manganite is spread over a broader temperature interval than in the polycrystalline case. The relative cooling power of the poly- and nanocrystalline manganites is used to evaluate a possible application for magnetic cooling below room temperature.
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