L. Leonyuk et al., SUPERCONDUCTIVITY AT 80 K IN SINGLE-CRYSTALS OF STRUCTURAL TYPE A(14)CU(24)O(41), Physica. C, Superconductivity, 282, 1997, pp. 773-774
Single crystals of structural type A(14)Cu(24)O(41) were grown and the
ir structural, optical and magnetic properties were investigated. On t
he base of the data obtained it is proposed that superconductivity in
the crystals of incommensurate phases is to be correlated with the Cu-
deficiency and the corresponding changes in characteristic Cu-O struct
ural units.