Oxide superconductor comprising Cu, Bi, Ca and Sr
Oxide superconductor having the formula Pb.sub.a (M.sub.1-x-y Ce
Oxide superconductors and method for producing same
Oxide superconductors encased in pan-derived carbon matrix
Oxide-superconducting tunneling device formed on a submicron rec
Oxygen plasma treatment for producing high Tc oxide superconduct
Oxygen plasma treatment of yttrium barium copper oxide