Bi系高温超导体的^(119)Sn的穆斯堡尔谱研究  

MOSSBAUER EFFECT STUDY OF Bi TYPE HIGH-TEMPERA TURE SUPERCONDUCTOR ^(119)Sn

作　　者：张道元[1] 杨碚芳[2] 柏林森[1] 吴泳华[3] 王晓洋[2] 阮耀钟[2] 

机构地区：[1]中国科学技术大学物理系,合肥230026 [2]中国科学技术大学材料科学与工程系 [3]中国科学技术大学基础物理中心

出　　处：《物理学报》1992年第8期1353-1356,共4页Acta Physica Sinica

基　　金：国家超导技术联合研究开发中心资助的课题

摘　　要：本文采用^(119)Sn作为探针原子,对Bi_(1.68)Pb_(0.32)Sr_(1.75)Ca_(1.75)Cu_(2.65-x)Sn_xO_y(0.2≤x≤0.8)样品进行室温下穆斯堡尔谱测量,结合X射线衍射与电性能测量结果,分析Sn在样品中的占位情况与电性能之间的关系,并得出四配位Cu位对高Tc相的超导电性起着较关键作用的结论。In this work, 110Sn is used as probe-atom, nd room temperature Mossbauer measurement of Bi1.68Pb0.32Sr1.75Ca1.75Cu2.65-xSnxOy (x=0.2-0.8) sample is performed. Combined with the results of X-ray diffraction and electric characteristic measurement, the relation between the occupancy of Sn in the sample and its electric characteristics is analysed, and an conclusion that squarecoordinated Cu performs a chief influence on the electric characteristic of high-transition-temperature (Tc) phase superconductor is reached.

关 键 词：高TC 超导体 穆斯堡尔谱 BI系 

分 类 号：O511[理学—低温物理]