High Temperature LFMR in Yttrium Doped Perovskite Manganites

作     者：盛晓波 童林夙 林萍华 杨石强 储成林 翟亚 

作者机构：Department of Electronic Engineering Department of Mechanical Engineering Southeast University Laboratory of Solid State Microstructure Nanjing University 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2003年第21卷第5期

页      面：548-551页

核心收录：

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

基　　金：ProjectsupportedbytheOpenedFoundationofNanjingUniversity (M9914 0 5 )andtheYoungScientistFoundationofSoutheastUniversity ( 92 0 2 0 0 10 16) 

主　　题：metal materials colossal magnetoresistance low field magnetoresistance perovskite manganites ceramics rare earths 

摘      要：Porous ceramic samples of Y doped perovskite manganites were prepared. In these samples, the transition from high temperature paramagnetic insulator to low temperature ferromagnetic metal as well as the low field magnetoresistance (LFMR) effect at the low temperature is similar to that in dense samples. Opposite to that in dense samples, LFMR effect in porous sample is observed at the high temperature close to the peak of MR T curves. The results suggest that the high temperature LFMR effect and the applicable colossal magnetoresistance (CMR) materials could be obtained by controlling the microstructures of this class of perovskite manganites.