La-Sm-Ca-Mn-O的晶格效应  

Lattice Effects in La-Sm-Ca-Mn-O

作　　者：刘宜华[1] 王成建[1] 张汝贞[1] 栾开政[1] 岳龙强[1] 梅良膜[1] 

机构地区：[1]山东大学物理系,山东济南250100

出　　处：《中国稀土学报》2001年第5期418-421,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家重点基础研究专项经费(G19980 6 130 10 );国家科技部资助项目

摘　　要：在La0 .67Ca0 .3 3 MnO3 氧化物中进行了掺Sm研究 ,结果发现 ,随着Sm掺入量的增加 ,材料的金属 绝缘体相变温度逐渐降低 ,对应的峰值电阻急剧增大 ,居里温度逐渐下降 ,材料的磁电阻比迅速增加。The doping effects of Sm in La 0.67 Ca 0.33 MnO 3 oxide were studied. The results show that with increasing the doping amount of Sm the phase transition temperature of metal isolator for the materials decreases monotonously, the corresponding peak resistance increases rapidly, the Curie temperature decreases monotonously, and the magneto resistance ratio increases quickly. The effects of doping Sm can be explained in terms of the lattice effects.

关 键 词：稀土锰氧化物 巨磁电阻效应 晶格效应 结构 磁性 

分 类 号：O482.5[理学—固体物理] TM27[理学—物理]