Electronic Transport Properties of La_(2/3)Ca_(1/3)Mn_(0.98)Cu_(0.02)O_3 Sintered at Different Temperature  

作　　者：胡清华 

机构地区：[1]School of Science, Wuhan University of Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2009年第2期300-303,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China (No.60471024)

摘　　要：The sol-gel method was adopted to prepare series of La2/3Cal/3Mn0.98Cu0.02O3 samples sintered at different temperatures, and the structure of samples, high-temperature electrical conductive mechanism and electronic transport properties of double-peak resistance were investigated. X-ray diffraction pattern indicates that the samples are in perovskite structures and obey the Vari- able-Rang Hopping Mechanism of p = p 0exp[（T0/T）^1/4] under high temperatures during the electrical conduction. In addition, based on the polycrystalline granular system surface and image, the reasonable explanation was given for the double-peak resistance phemomenon.The sol-gel method was adopted to prepare series of La2/3Cal/3Mn0.98Cu0.02O3 samples sintered at different temperatures, and the structure of samples, high-temperature electrical conductive mechanism and electronic transport properties of double-peak resistance were investigated. X-ray diffraction pattern indicates that the samples are in perovskite structures and obey the Vari- able-Rang Hopping Mechanism of p = p 0exp[（T0/T）^1/4] under high temperatures during the electrical conduction. In addition, based on the polycrystalline granular system surface and image, the reasonable explanation was given for the double-peak resistance phemomenon.

关 键 词：SOL-GEL Cu doping electrical conductive mechanism rare earth 

分 类 号：TF124.5[冶金工程—粉末冶金]