magnetic measurements; manganites; magnetocaloric effect
Abstract :
[en] 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.
Research center :
SUPRATECS - Services Universitaires pour la Recherche et les Applications Technologiques de Matériaux Électro-Céramiques, Composites, Supraconducteurs - ULiège
Disciplines :
Materials science & engineering Physics
Author, co-author :
Pekala, Marek; University of Warsaw
Drozd, V.; Kiev National Taras Shevchenko University
CGRI - Commissariat général aux Relations internationales [BE] MNiSW - Polish Ministry of Science and Higher Education [PL] F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE] Kasa Mianowskiego (Poland)
Commentary :
The original publication is available at http://springerlink.com/content/a61u73m710512760/.