Pr_(1.85)Ce_(0.15)CuO_4中氧掺杂和Cu位Fe替代的对比研究  

EFFECT OF OXYGEN CONTENT AND FE SUBSTITUTION FOR Cu In Pr_(1.85)Ce_(0.15)CuO_4

作　　者：王法社[1] 赵勇[1] 

机构地区：[1]磁浮技术与磁浮列车教育部重点实验室,西南交通大学超导研究开发中心,西南交通大学,成都610031

出　　处：《低温物理学报》2010年第5期360-363,共4页Low Temperature Physical Letters

基　　金：国家自然科学基金(批准号:50588210);国家973基础研究项目(批准号:2007CB616906)资助的课题

摘　　要：通过新的方法制备了电子型Pr1.85Ce0.15CuO4-x和Pr1.85Ce0.15Cu1-xFexO3.9系列样品.x射线衍射表明:制备的样品具有单相结构,杂相比较少.磁测量的结果表明:在Pr1.85Ce0.15CuO4-x中,0.05≤x≤0.20时具有超导电性,当x=0.10时,具有最高起始转变温度为TMCax=24.5K.而Pr1.85Ce0.15Cu1-xFexO3.9,当x≤0.02时,样品低温下显示超导电性,Fe的掺杂使样品的超导转变温度下降的很快,正常态的磁矩随着掺杂量的增大而增大,并对相关机理进行了探讨.The samples of Pr1.85Ce0.15CuO4-x and Pr1.85Ce0.15Cu1-xFexO3.9 were prepared by the new method. x-ray diffraction revealed that nearly single-phase Pr1.85Ce0.15CuO4-x and Pr1.85Ce0.15Cu1-xFexO3.9 have been obtained,For the samples of Pr1.85Ce0.15CuO4-x,Superconductivity transitions are observed in range of 0.05≤x≤0.20,and TMaxC=24.5K.For the samples of Pr1.85Ce0.15Cu1-xFexO3.9,Superconducting transitions are observed in the Fe concentration range of x≤0.02. Tc decrease with increasing of x,the magnetic Moment of Nomal state increase with in increasing of x,and the mechanism is discussed.

关 键 词：氧含量 超导电性 载流子 

分 类 号：O511.2[理学—低温物理]