文献类型：期刊文献

英文题名：Magnetocaloric effect in (La_0.47Gd_0.2)Sr_0.33MnO₃ polycrystalline nanoparticles

作者：Juan, Zhao[1];Gui, Wang[1]

机构：[1]Guangdong Ocean Univ, Coll Engn, Zhanjiang 524088, Peoples R 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：SCI-EXPANDED(收录号：WOS:000260301900010)、、WOS

语种：英文

外文关键词：Chemical synthesis; Nanostructure; Magnetocaloric effect; Perovskite oxide

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 degrees 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 T-C 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. (c) 2008 Elsevier B.V. All rights reserved.