Abstract
Gold was introduced by diffusion into melt-textured YBCO. This gold-enriched material exhibits a critical temperature of 97 K as measured by a transport method. Introduction of gold into melt-textured YBCO produces a pronounced deficiency in oxygen stoichiometry, and shortens the c-axis parameter. In spite of the latter changes in the YBCO lattice, the material remains superconducting and the critical temperature is enhanced. Gold seems to keep the c parameter of YBCO in the range of values where the system remains orthorhombic, although there is a considerable loss of oxygen.
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