La_(0.67)Ca_(0.33)MnO_3/SrBi_2Ta_2O_9复合材料的制备及电输运特性  

Preparation and Electrical Transport Properties of LCMO/SBT Composites

作　　者：孙超伦[1,2] 李旭升[1,2] 宋爱琴[1] 熊永红[2] 

机构地区：[1]河南理工大学物理化学学院,河南焦作454003 [2]华中科技大学物理学院,武汉430074

出　　处：《河南师范大学学报（自然科学版）》2011年第2期62-64,67,共4页Journal of Henan Normal University(Natural Science Edition)

摘　　要：用固相反应法制备了(La0.67Ca0.33MnO3)1-x/(SrBi2Ta2O9)x,其中x=0,0.005,0.01,0.015,0.02,0.03,0.05,0.07,0.10,0.15,0.20,0.25,并对样品的电输运性质进行了一系列的研究.结果表明;随着掺杂物质Sr-Bi2Ta2O9(SBT)的增加,复合物的电阻率变化呈现:增大—减小—增大的趋势.文中对这一现象产生的原因进行了解释.The research has prepared the(La0.67Ca0.33MnO3)1-x/(SrBi2Ta2O9)x(x=0,0.015,0.02,0.03,0.05,0.07,0.10,0.15,0.20,0.25) by conventional solid-state reaction.The electrical transport properties are investigated systemically.The results show that with the increase of doping substances SrBi2Ta2O9(SBT),complex changes take place in trend in the resistivity increase-decrease-to increase.The cause of this phenomenon is explained.

关 键 词：钙钛矿 阻温特性 团簇效应 

分 类 号：N55[自然科学总论] G658.3[文化科学—教育学]