添加Cu_2S对 Bi-Pb-Sr-Ca-Cu-O体系超导性的影响(英文)  

The Effect of Cu_2S Addition on the Superconductivity of Bi－Pb－Sr－Ca－Cu－O System

作　　者：陈学安[1] 陈德俊[1] 徐翠英[1] 张金彪[1] 朱道本[1] 杨德亮[1] 

机构地区：[1]中国科学院化学所,北京100080

出　　处：《物理化学学报》1994年第8期704-709,共6页Acta Physico-Chimica Sinica

摘　　要：本文对Cu2S添加的Bi－Pb－Sr－Ca－Cu－O体系进行了低温电阻、X射线衍射和XPS研究．实验结果表明，加入少量的Cu2S能够降低高Tc相的形成温度，改善超导性能，加入Cu2S引起了Cu2P3／2谱的主峰向低结合能方向移动，并减少其卫星峰的面积．这表明Cu2S的加入减少了Cu2＋的量，即导致空穴载流子浓度的减小．Superconductivity of Cu2S doped Bi-Pb-Sr-CaCu-O system has been investigated by resistance, X-ray diffraction and XPS measurements. It was found that an appropriate amount of Cu2S can lower the optimum sintering temperature and enhance the formation of the high-Tc phase. The analyses of XPS spectra reveal that the addition of Cu2S causes the negative chemical shifts of the Cu 2p3/2 main peaks and the diminution of their satellite areast suggesting that the hole contents decrease with increasing Cu2S concentration.

关 键 词：超导性 硫化铜 铋-铅-锶 钙-铜-氧 

分 类 号：TM261[一般工业技术—材料科学与工程]