Enhancement of Curie Temperature and Magnetoresistance in the Perovskit es La_(2/3)Ca_(1/_3)Mn_(1-x)Si_(x)O_(3)

作     者：LI Run-Wei WANG Zhi-Hong SUN Ji-Rong CHEN Xin SHEN Bao-Gen 李润伟;王志宏;孙继荣;陈新;沈保根

作者机构：State Key Laboratory of MagnetismInstitute of Physics and Center for Condensed Matter PhysicsChinese Academy of SciencesBeijing 100080 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2000年第17卷第11期

页      面：832-834页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Supported by National Natural Science Foundation of China under Grant Nos.59702011 and 59525101 the 973 State Key Program of Basic Research of China(G1998061314) 

主　　题：temperature. resistance (3) 

摘      要：Structural,magnetic,and transport properties of perovskite La_(2/3)Ca_(1/_3)Mn_(1-x)Si_(x)O_(3)(x=0,0.025,0.05)have been *** incorporation of Si decreases the overall resistivity,but obviously increases the Curie temperature(TC),metal-insulator transition temperature(TP),and the magnetoresistance ratio MR(defined as[R(0)-R(H)]/R(0))near room *** with La_(2/3)Ca_(1/_3)MnO_(3)the TC,TP,and MR of the sample with x=0.05 increase by 30,45K,and 20%,*** effects may play a more important role than the magnetic dilution in the case of low Si substitution.