Annealing in a PbO atmosphere for highTcsuperconductivity of Bihyphen;Srhyphen;Cahyphen;Cuhyphen;O films

摘要

(Bihyphen;Srhyphen;O)/(Cahyphen;Cuhyphen;O) multilayered films were prepared by a plasmahyphen;controlled sputtering method and annealed under various conditions to induce the superconductivity in the films. The annealing in the presence of PbO vapor at 860thinsp;deg;C was effective to convert the unleaded insulating multilayered films to superconductors with onset and zerohyphen;resistivity temperatures of 113 and 103 K, respectively. Auger electron spectroscopy verified the incorporation of Pb in the films.