物理化学学报 >> 1994, Vol. 10 >> Issue (08): 704-709.doi: 10.3866/PKU.WHXB19940807

研究论文 上一篇    下一篇

添加Cu2S对Bi-Pb-Sr-Ca-Cu-O体系超导性的影响

陈学安, 陈德俊, 徐翠英, 张金彪, 朱道本, 杨德亮   

  1. 中国科学院化学研究所，北京 100080
  • 收稿日期:1993-02-13 修回日期:1993-08-14 发布日期:1994-08-15
  • 通讯作者:

The Effect of Cu2S Addition on the Superconductivity of Bi-Pb-Sr-Ca-Cu-O System

Chen Xue-An, Chen De-Jun, Xu Cui-Ying, Zhang Jin-Biao, Zhu Dao-Ben, Yang De-Liang   

  1. Institute of Chemistry, Academia Sinica, Beijing 100080
  • Received:1993-02-13 Revised:1993-08-14 Published:1994-08-15
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摘要：

本文对Cu_2S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Cu_2S能够降低高T_c相的形成温度，改善超导性能，加入Cu_2S引起了Cu 2p_(3/2)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Cu_2S的加入减少了Cu~(2+)的量，即导致空穴载流子浓度的减小．

关键词: 超导性, Cu2S添加的Bi-Pb-Sr-Ca-Cu-O体系, R-T, XRD, XPS

Abstract:

Superconductivity of Cu_2S 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 Cu_2S can lower the optimum sintering temperature and enhance the formation of the high-T_c phase. The analyses of XPS spectra reveal that the addition of Cu_2S causes the negative chemical shifts of the Cu 2p_(3/2) main peaks and the diminution of their satellite areast suggesting that the hole contents decrease with increasing Cu_2S concentration.

Key words: Superconductivity, Cu2S doped Bi-Pb-Sr-Ca-Cu-O system, R-T, XRD, XPS