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Non-stoichiometry and isomorphic substitutions for copper in single crystals of Y (123)-type single phases

1993; IOP Publishing; Volume: 6; Issue: 12 Linguagem: Inglês

10.1088/0953-2048/6/12/006

1361-6668

L. Leonyuk, A. Vetkin,

Physics of Superconductivity and Magnetism

Y (123)-type single crystals with partial substitution of Al and Zn for Cu have been grown and investigated. The X-ray phase data and micro-XRD analysis have shown that all the crystals grown were deficient with respect to the occupation of Cu sites in the (123)-type structure. The magnitude of the deficiency was varied by changing the conditions of synthesis and the character of dopants and was related to Tc values by a parabolic dependence. This dependence allows one to estimate the superconducting properties of crystals on the basis of micro-XRD data.