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Thermodynamic stability and superconductivity of the Bi–Sr–Ca(Y)–Cu–Li–O system

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Abstract

In order to understand the effects of the thermodynamic stability on superconductivity, the thermodynamic stability of the Bi2Sr2CaCu2-xLixOy system and the Bi2Sr2YCu2-xLixOy system was studied. It is found that the broad ranges (0 ≤ x ≤ 0.6) of solid solution may be thermodynamically stable at high temperatures for the Bi2Sr2CaCu2-xLixOy), system and the Bi2Sr2YCu2-xLixOy), system. At equilibrium at low temperatures, however, solid solubility is eliminated, and only the end member compounds and possibly intermediate compounds of fixed composition remain for 0.3 ≤ x ≤ 0.6. It suggests that Li can destroy the thermodynamic stability. Superconductivity is improved by Li-doping, which may be related to the thermodynamic instability.

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Authors and Affiliations

  1. Department of Physics, University of Science & Technology of China (USTC), Anhui, 230026, Hefei, People’s Republic of China

    Chen Xianhui, Cao Liezhao & Chen Zhaojia

  2. Department of Applied Chemistry, University of Science & Technology of China (USTC), Anhui, 230026, Hefei, People’s Republic of China

    Lin Chun, Qian Yitai & Chen Zuyao

  3. Structure Research Laboratory, University of Science & Technology of China (USTC), Anhui, 230026, Hefei, People’s Republic of China

    Lu Bin

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  1. Chen Xianhui
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  2. Lin Chun
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  3. Lu Bin
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  4. Qian Yitai
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  5. Cao Liezhao
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  6. Chen Zhaojia
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  7. Chen Zuyao
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Xianhui, C., Chun, L., Bin, L. et al. Thermodynamic stability and superconductivity of the Bi–Sr–Ca(Y)–Cu–Li–O system. Journal of Materials Research 8, 1510–1514 (1993). https://doi.org/10.1557/JMR.1993.1510

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  • DOI: https://doi.org/10.1557/JMR.1993.1510

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