文献类型：期刊文献

英文题名：Magnetic Properties of (La_0.47Gd_0.2)Sr_0.33MnO₃ Nanoparticles with Different Grain Sizes

作者：Juan, Zhao[1];Biao, Guan[1];Gang, Chen[2];Gui, Wang[1]

机构：[1]Guangdong Ocean Univ, Coll Engn, Zhanjiang 524088, Peoples R China;[2]Shandong Univ, Jinan 250061, Peoples R China

年份：2010

卷号：39

期号：11

起止页码：1948

外文期刊名：RARE METAL MATERIALS AND ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000291966000008)、、WOS

语种：英文

外文关键词：magnetic properties; nanoparticles; (La0.47Gd0.2)Sr0.33MnO3

外文摘要：(La0.47Gd0.2)Sr0.33MnO3 nanoparticles were synthesized by an amorphous heteronuclear complexing method. The microstructure and magnetic properties of the synthesized nanoparticles were characterized by XRD, HRTEM and MPMS. XRD and selected area electron diffraction (SAD) analyses reveal that the products are of pure single-phase rhombohedral structure. TEM observation shows that the particle sizes of the products calcined at 600, 800 and 1000 degrees C for 10 h are about 40-50 nm, 90-100 nm and 140-150 nm, respectively. The Curie temperature T-C (298 K) of the nanoparticles does not depend on the particle size, while the relative cooling power (RCP) is determined by the particle size. (La0.47Gd0.2)Sr0.33MnO3 with particle sizes ranging from 90 nm to 100 nm has the largest RCP, which may be a suitable candidate as working substance in magnetic refrigeration at room temperature.