锡、铅掺杂下的Bi-2212超导相的正电子湮没研究  

STUDY OF Bi-2212 PHASE DOPPEDSn(Pb)BY MEANS OF PAT

作　　者：马庆珠[1,2,3] 黄晓茜[1,2,3] 熊小涛[1,2,3] 李阳[1,2,3] 曹国辉[1,2,3] 张天保[1,2,3] 王文华[1,2,3] 王耘波[1,2,3] 魏龙[1,2,3] 

机构地区：[1]北京科技大学物理系 [2]北京科技大学材料物理系 [3]中国科学院核技术开放实验室

出　　处：《低温物理学报》1997年第2期128-133,共6页Low Temperature Physical Letters

摘　　要：锡、铅掺杂下的Ｂｉ－２２１２超导相的正电子湮没研究马庆珠，黄晓茜，熊小涛，李阳，曹国辉，张天保，王文华，王耘波，魏龙北京科技大学物理系，北京１０００８３北京科技大学材料物理系，北京１０００８３中国科学院核技术开放实验室，北京１０００８０１９９６年１０...lnvestigation on the effect of Sn/Pb-dopped Bi-2212 superconductors has been carried out by the simultaneous measurements of the spectra of positron an- nihilation lifetime and positron Doppler broadening , together with X-ray diffrac- tion. The results of samples with different dopping level show that the occupation of Sn atoms on Bi sites. At weak dopping level , Sn dopping results in a enhance- ment of cooperatiott between layers and increment of superconducting transition temperature. At the strong dopping level , Sn atoms occupy the sites of Cu-O lay- ers , and at the same time , the other nonsuperconducting phases appear , which re- sults in a decline of the superconducting transition temperature.

关 键 词：超导体 铋超导体 正电子湮没 锡 铅 掺杂 

分 类 号：TM261[一般工业技术—材料科学与工程]