Nd_(0.5)Ca_(0.5)MnO_3电荷有序态下电荷输运机制的研究  

Study of Transport Properties in Charge Ordered Nd_(0.5)Ca_(0.5)MnO_3

作　　者：刘毅[1] 孔辉[2] 

机构地区：[1]贵州大学理学院,贵州贵阳550003 [2]中国科学技术大学材料科学与工程系,合肥230026

出　　处：《贵州大学学报（自然科学版）》2006年第3期257-258,293,共3页Journal of Guizhou University:Natural Sciences

基　　金：贵州省科技厅自然科学基金项目(黔科合J字(2005)2091号)资助

摘　　要：制备了单相多晶Nd0.5Ca0.5MnO3样品,研究了该体系在电荷有序态下的电荷输运机制.研究表明,该体系在低温下表现为半导体输运特性,在250K处发生了电荷有序相变;电荷有序态下的电荷输运机制满足可变程跃迁模型.The transport properties of charge ordered Nd0.5Ca0.5MnO3 have been investigated. Resistivity measurement shows that the sample undergoes a charge ordering transition at about Tco = 250K. It was found that the resistivity data show a variable-range hopping （VRH） process in the charge ordered state.

关 键 词：锰氧化物 电荷有序态 电阻率 

分 类 号：O738[理学—晶体学]