Abstract
High-temperature superconductivity in oxides of the type La2−x Ba x (Sr x )CuO4, YBa2Cu3O7−δ , La3−x Ba3+x Cu6O14 and Bi(Tl)-Ca-Sr(Ba)-Cu-O systems is discussed, with special emphasis on the experimental findings from the author’s laboratory. The importance of holes on oxygen and of the Cu1+ (d 10) state is examined. A transition is shown to occur from chain- to sheet-superconductivity in YBa2Cu3O7−δ accompanying a change in oxygen stoichiometry. Some of the important material parameters and technological applications are briefly presented. There is every hope that materials withT c close to room temperature will be discovered in the near future. All the highT c oxides found hitherto have perovskite-related structures with two-dimensional Cu-O sheets.
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Contribution No. 485 from the Solid State and Structural Chemistry Unit.
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Rao, C.N.R. High-temperature ceramic oxide superconductors. Sadhana 13, 19–35 (1988). https://doi.org/10.1007/BF02811956
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DOI: https://doi.org/10.1007/BF02811956