Dy和Gd的掺杂对LaMnO3电输运性质的影响  

Effect of Dy and Gd Doping on Electrical Transport Properties of LaMnO3

作　　者：陈金欢 李晓欣 邢茹[1,2] 刘瑞红 陈梦蝶 赵建军[1,2] CHEN Jinhuan;LI Xiaoxin;XING Ru;LIU Ruihong;CHEN Mengdie;ZHAO Jianjun(Baotou Teachers' College Physics Institute of Science and Technology,Baotou 014030,China;Key Laboratory For Magnetism and Magnetic Material of Inner Mongolia Autonomous Region,Baotou Teachers College,Baotou 014030,China)

机构地区：[1]包头师范学院物理科学与技术学院,内蒙古包头014030 [2]内蒙古自治区磁学与磁性材料重点实验室,包头师范学院,内蒙古包头014030

出　　处：《有色金属工程》2020年第11期27-32,共6页Nonferrous Metals Engineering

基　　金：国家自然科学基金(11164019,51562032,61565013);内蒙古自治区科学基金(2015MS0109);内蒙高校科学研究基金(NJZZ11166,NJZY12202);包头市科学技术局产学研合作项目(2014X1014-01,2015Z2011);内蒙古自治区研究生科研创新项目(S201710127(S01))。

摘　　要：采用传统的高温固相反应法制备了钙钛矿锰氧化物La1-xRxMnO3(x=0、0.13,R为Dy、Gd)系列多晶样品。通过X射线电子衍射(XRD)图谱,电阻率-温度(ρ-T)曲线,研究了该组样品的结构和电输运性质。结果表明:该组样品都具有良好的单相性,属于正交晶系;在所测量的温区内,属于半导体材料,A位的平均离子半径不同,外加磁场对电传导的影响不同;该组样品的ρ-T曲线拟合表明,该组样品在测量的温区内都遵循变程跳跃的导电方式。Polycrystalline samples of perovskite manganese oxide La1-xRxMnO3(x=0,0.13,R is Dy,Gd)were prepared by traditional high temperature solid phase reaction method.The structure and electrical transport properties of the samples were studied by X-ray diffraction(XRD)patterns and resistivity-temperature(ρ-T)curves.The results show that all the samples have excellent monophasic property and belong to orthorhombic system;in the measured temperature region,they belong to semiconductor materials,the average ion radius of A site is different,and the effect of external magnetic field on electrical conductivity is different.Theρ-T curves fitting of this group of samples shows that all the samples follow the conduction mode of variable range jump in the measured temperature region.

关 键 词：钙钛矿锰氧化物 晶体结构 半导体材料 电输运性质 

分 类 号：O469[理学—凝聚态物理]