PROCESS FOR MAKING SUPERCONDUCTING TL-PB-SR-CA-CU OXIDE FILMS AND DEVICES

摘要

A superconducting Tl-Pb-Sr-Ca-Cu-O thin film comprised of at least one phase of the formula Tl0.5Pb0.5Sr2Ca1+nCu2+nO7+2n where n=0, 1 or 2 is disclosed, which is prepared by a process comprising sputtering an oxide film onto a dielectric substrate from an oxide target containing preselected amounts of Tl, Pb, Sr, Ca and Cu, and heating an oxygen-containing atmosphere in the deposited film in the presence of a source of thallium oxide and lead oxide and cooling the film.