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

✍ Scribed by 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 Jr.; W.F. Peck; E.A. Rietman

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 443 KB
• Volume: 153-155
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(88)90718-6

✦ Synopsis

Ambient temperature measurements of the crystallographic cell parameters for oxygen deficient Ba2YCu3OT_ ~ prepared by gettered annealing indicate the presence of microscopic differences in the oxygen configuration at fixed 5 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 Bi2Sr2CaCu208+ ~ is described, as is the stabilization of ll0K superconductivity via partial Pb/Bi substitution with long time annealing.