High-Tc superconducting phases in the series Bi2.1(Ca, Sr)n+lCunO2n+4+δ

@article{Tallon1988HighTcSP,
  title={High-Tc superconducting phases in the series Bi2.1(Ca, Sr)n+lCunO2n+4+$\delta$},
  author={J. L. Tallon and Robert G. Buckley and P. W. Gilberd and Melinda Presland and Ian W. M. Brown and M. E. Bowden and L. A. Christian and Reiner Goguel},
  journal={Nature},
  year={1988},
  volume={333},
  pages={153-156}
}
Following the report of Maeda et al.1 on high-Tc superconductivity in samples of nominal composition BiSrCaCu2Ox we have identified three distinct phases in the homologous series Bi2.1(Ca, Sr)n+lCunO2n+4+δ with n = 1,2 and 3. These have zero resistance Tcs of 80 K, 91 K and 105 K respectively. The structures in the homologous series appear to be based on alternating double bismuth Bi2O2 layers and perovskite (Sr, Ca)O–CuO2 layers, with higher members obtained by intercalating additional 3.1… 

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  • HazenPrewitt Chu
  • Materials Science
    Physical review letters
  • 1988
X-ray diffraction and electron microscopy data are consistent with a structure of alternating perovskite and Bi-Ca-Sr-Cu-O layers, which reveals a b-axis superstructure of 27.2 A, numerous stacking faults, and other defects.