Preparation and Magnetic Property of La_(0.7)Sr_(0.3)MnO_3 Nanorod by Combination Sol-Gel with Molten Salt

作     者：QI Shu-yan FENG Jing XU Xiao-dong WANG Jing-ping HOU Xiang-yu ZHANG Mi-lin 

作者机构：Key Laboratory of Superlight Materials ＆ Surface Technology of Ministry of Education Harbin Engineering University Harbin 150001 P. R. China 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2008年第24卷第6期

页      面：672-674页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China (No.20801016) Natural Science Foundation of Heilong-jiang Province, China(No.B2007-8) Research Fund for the Doctoral Program of Higher Education of China for New Teach-ers(No.20070217060) Basic Research Fund of Harbin Engineering University, China(No.HEUFT05019) 

主　　题：Molten salt synthesis Sol-gel processes Perovskite Nanostructured materials 

摘      要：La0.7Sr0.3MnO3（LSMO） nanorods were synthesized by a method combining sol-gel with molten salts at 950 ℃ for 10 h, which employed KCl＋NaCl（mass ratio 4：1） as eutectic molten salts. The morphologies and magnetic properties of the resulting LSMO nanorods were investigated by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, and vibrating sample magnetometer（VSM） measurements. It was found that the obtained perovskite manganite LSMO was a uniform nanorod with a diameter of about 50 nm and a length of longer than 500 rim. The Curie temperature（To） of the LSMO nanorod used here was 262 K, much lower than that of bulky single crystal LSMO（360 K）. The low Curie temperature might be a result of the great disorder near the grain boundary, which could be observed clearly from the TEM picture.