Studies of oxygen-deficient Ba2YCu3O7-δ and superconductivity Bi(Pb)SrCaCuO

R. J. Cava, B. Batlogg, S. A. Sunshine, T. Siegrist, R. M. Fleming, K. Rabe, L. F. Schneemeyer, D. W. Murphy, R. B. van Dover, P. K. Gallagher, S. H. Glarum, S. Nakahara, R. C. Farrow, J. J. Krajewski, S. M. Zahurak, J. V. Waszczak, J. H. Marshall, P. Marsh, L. W. Rupp, W. F. PeckE. A. Rietman

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Ambient temperature measurements of the crystallographic cell parameters for oxygen deficient Ba2YCu3O7-δ prepared by gettered annealing indicate the presence of microscopic differences in the oxygen configuration at fixed δ dependent on annealing temperature. The loss of superconductivity with increasing oxygen deficiency is shown to be due to a step-like increase in length of the plane copper-apical oxygen bond, and not to the orthorhombic to tetragonal transition. The crystal structure of the 84K superconductor Bi2Sr2CaCu2O8+δ is described, as is the stabilization of 110K superconductivity via partial Pb/Bi substitution with long time annealing.

Original languageEnglish
Pages (from-to)560-565
Number of pages6
JournalPhysica C: Superconductivity and its applications
Issue numberPART 1
StatePublished - Jun 1988


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