A New High-Temperature Superconductor: Bi2Sr3-x Cax Cu2O8+y

@article{Subramanian1988ANH,
  title={A New High-Temperature Superconductor: Bi2Sr3-x Cax Cu2O8+y},
  author={M. A. Subramanian and Charlie C. Torardi and Joseph C. Calabrese and Jagannatha Gopalakrishnan and K. J. Morrissey and T. R. Askew and Richard B. Flippen and Uma Chowdhry and Arthur W. Sleight},
  journal={Science},
  year={1988},
  volume={239},
  pages={1015 - 1017}
}
A new superconductor that displays onset behavior near 120 K has been identified as Bi2Sr3-xCaxCu2O8+y, with x ranging from about 0.4 to 0.9. Single crystal x-ray diffraction data were used to determine a pseudo-tetragonal structure based on an A-centered orthorhombic subcell with a = 5.399 �, b= 5.414�, and c = 30.904 �. The structure contains copper-oxygen sheets as in La2CuO4 and YBa2Cu3O7, but the copper-oxygen chains present in YBa2Cu3O7 do not occur in Bi2Sr3-xCaxCu2O8+y. The structure is… 

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