Acta Phys. -Chim. Sin. ›› 1994, Vol. 10 ›› Issue (08): 704 -709.doi: 10.3866/PKU.WHXB19940807

• ARTICLE • Previous Articles     Next Articles

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
  • Contact: Chen Xue-An

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