TiO2复合对La2／3(Ca0.65Ba0.35)1／3MnO3电输运和磁电阻效应的影响  

Effect of Complex TiO_2 Addition on the Electrical Transport and Magnetoresistance Properties of La_(2/3)(Ca_(0.65)Ba_(0.35))_(1/3)MnO_3

作　　者：赵辉[1] 王向群[1] 杜晓波[1] 于涛[1] 王冬梅[1] 董义[1] 张艳香[2] 

机构地区：[1]吉林大学物理学院,吉林长春130021 [2]吉林省教育学院,吉林长春130022

出　　处：《吉林大学学报（理学版）》2008年第4期729-733,共5页Journal of Jilin University:Science Edition

摘　　要：利用甘氨酸-硝酸盐(GNP)法合成了La2/3(Ca0.65Ba0.35)1/3MnO3纳米颗粒体系,与TiO2复合后,得到La2/3(Ca0.65Ba0.35)1/3MnO3/xTiO2体系(x=0,0.02,0.035,0.055,0.09,0.17),通过X射线衍射、Raman光谱、扫描电子显微镜和磁电阻效应测试,对合成产物的结构及性能进行表征.结果表明,样品均成立方对称结构,复合使低场磁电阻增强,电阻率增大.La2/3 （Ca0.65 Ba0.35）1/3 MnO3 fine powders were synthesied by a Glyine-Nitrate Process （GNP） method. The influences of TiO2 contents on the MR and electrical transport properties （resistivity） of a series of composite samples of La2/3 （ Ca0.65 Ba0.35 ）1/3 MnO3/xTiO2 （x= 0,0.02,0.035,0.055, 0.09,0.17） were studied. Results show that TiO2 causes the low-field magnetoresistance, and increases the resistivity.

关 键 词：钙钛矿锰基氧化物 复合 颗粒表面 自旋相关 低场磁电阻效应 

分 类 号：O482.5[理学—固体物理]