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Superconductivity in Bi2.2Ca2.8−x Sr x Cu2O y system and effect of rare earth substitution |
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| Authors: | Ram Prasad N C Soni A Gulnar C V Tomy D T Adroja S K Malik |
| Affiliation: | 1. Metallurgy Division, Bhabha Atomic Research Centre, 400 085, Trombay, Bombay, India 2. Tata Institute of Fundamental Research, 400 005, Bombay, India 3. Indian Institute of Technology, 400 076, Powai, Bombay, India |
| Abstract: | The oxide system Bi2.2Ca2.8−x Sr x Cu2O y has been investigated for superconductivity as a function of Ca/Sr ratio withx=0.7, 1.0, 1.4 and 1.8. All these compositions are found to be superconducting with onset temperature in the range of 80–90 K implying a large homogeneity range between Sr and Ca for the superconductivity to occur in this system. Effect of partial replacement of Bi by rare earths has been studied and it is observed that 20% replacement of Bi by Nd and Eu does not significantly affect the superconducting transition temperature. |
| Keywords: | HighT c superconductivity oxide superconductors rare earths |
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