引用本文:
陈学安, 陈德俊, 徐翠英, 张金彪, 朱道本, 杨德亮. 添加Cu2S对Bi-Pb-Sr-Ca-Cu-O体系超导性的影响[J]. 物理化学学报,
1994, 10(08): 704-709.
doi:
10.3866/PKU.WHXB19940807
Citation: Chen Xue-An, Chen De-Jun, Xu Cui-Ying, Zhang Jin-Biao, Zhu Dao-Ben, Yang De-Liang. The Effect of Cu2S Addition on the Superconductivity of Bi-Pb-Sr-Ca-Cu-O System[J]. Acta Physico-Chimica Sinica, 1994, 10(08): 704-709. doi: 10.3866/PKU.WHXB19940807
Citation: Chen Xue-An, Chen De-Jun, Xu Cui-Ying, Zhang Jin-Biao, Zhu Dao-Ben, Yang De-Liang. The Effect of Cu2S Addition on the Superconductivity of Bi-Pb-Sr-Ca-Cu-O System[J]. Acta Physico-Chimica Sinica, 1994, 10(08): 704-709. doi: 10.3866/PKU.WHXB19940807
添加Cu2S对Bi-Pb-Sr-Ca-Cu-O体系超导性的影响
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．
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关键词:
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超导性
- / Cu2S添加的Bi-Pb-Sr-Ca-Cu-O体系
- / R-T
- / XRD
- / XPS
English
The Effect of Cu2S Addition on the Superconductivity of Bi-Pb-Sr-Ca-Cu-O System
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.
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Key words:
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Superconductivity
- / Cu2S doped Bi-Pb-Sr-Ca-Cu-O system
- / R-T
- / XRD
- / XPS
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