Synthesis, structure, and properties of A/sub 2/B/sub 2/Ca/sub n/minus/1/Cu/sub n/O/sub 2n/plus/4/ superconductors (A/B = Bi/Sr or Tl/Ba, and n = 1, 3, 3)

There is now a new series of high temperature superconducting oxides that may be represented as A/sub 2/B/sub 2/Ca/sub n/minus/1/Cu/sub n/O/sub 2n+4/ where A/B = Bi/Sr or T1/Ba, and n, the number of CuO/sub 2/ sheets stacked consecutively in the structure, equals 1, 2, or 3. There is a general trend toward higher superconducting transition temperatures as n increases. The preoperative conditions, superconducting properties, and structures of these compounds are discussed. 12 refs., 3 figs., 2 tabs.