L. Leonyuk et al., AN INFLUENCE OF STOICHIOMETRY ON PROPERTIES OF Y(RE)-(123)-TYPE SINGLE-CRYSTALS, Physica. C, Superconductivity, 235, 1994, pp. 807-808
A relationship between the deviation of cation sublattice from stoichi
ometry, on the one hand, and the crystal symmetry, superconducting pro
perties and optical spectra, on the other hand, has been analyzed in s
ingle crystals of Y(RE)-(123)-type, where RE denotes the rare earth el
ements. With respect to the deficiency of Cu sites d(C)u, the synthesi
zed single crystals were divided into two regions, in which the superc
onductivity is caused by oxygen concentration and deviation of cation
sublattice from stoichiometry.