文献类型：期刊文献

英文题名：Magnetocaloric effect in (La0.47Gd0.2)Sr0.33MnO3 polycrystalline nanoparticles

作者：Juan, Zhao[1]; Gui, Wang[1]

机构：[1] Engineering College, Guangdong Ocean University, Zhanjiang, 524088, China

年份：2009

卷号：321

期号：1

起止页码：43

外文期刊名：Journal of Magnetism and Magnetic Materials

收录：EI(收录号：20084311660390)、Scopus(收录号：2-s2.0-54149117993)

语种：英文

外文关键词：Curie temperature - Synthesis (chemical) - X ray diffraction - Amorphous materials - Lanthanum compounds - Strontium compounds - Gadolinium compounds - Magnetic refrigeration - Nanoparticles - Manganese compounds - Solid state reactions

外文摘要：In this paper, nanosized particles of (La0.47Gd0.2)Sr0.33MnO3 perovskite-type oxides were successfully synthesized at a relatively low calcinated temperature at 800 °C for 10 h using amorphous molecular alloy as precursor. X-ray diffraction (XRD) and electron diffraction (ED) revealed that the resulting product is of pure single-phase rhombohedral structure. The Curie temperature TC and magnetic entropy change (MCE) in (La0.47Gd0.2)Sr0.33MnO3 polycrystalline nanoparticles are determined and compared to those of similar systems prepared by the conventional solid-state reaction method. The Curie temperature TC is shifted to 298 k, and a relatively large MCE with a broad peak around Curie temperature is observed in (La0.47Gd0.2)Sr0.33MnO3 polycrystalline particles. These results suggested that this material is a suitable candidate as working substance in magnetic refrigeration near room temperature. ? 2008 Elsevier B.V. All rights reserved.