期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 354, 期 47-51, 页码 5308-5314出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2008.06.112
关键词
Nanocrystals; X-ray diffraction; Magnetic properties; Nanoparticles
The sol-gel method is applied to prepare the polycrystalline La0.8Sr0.2MnO3 manganite and to reduce grain sizes of nanocrystalline sample down to 23 nm. The magnetocaloric effect was determined from isothermal magnetization measurements. Transition from the polycrystalline to nanocrystalline structure reduces the size of magnetocaloric effect and markedly broadens the temperature interval over which it occurs. The relative cooling power RCP(S) = 35 J/kg in polycrystalline manganite remains almost the same in the nanocrystalline case. (c) 2008 Elsevier B.V. All rights reserved.
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