Preparation of Bi(Pb)-Sr-Ca-Cu-O Thin Films With Tc(Zero) at above 100K

Abstract

Superconducting Bi(Pb)-Sr-Ca-Cu-O thin films are prepared on single crystal (100) MgO substrates by oxygen reactive ion beam sputtering. All the films are deposited at 400°C and annealed between 830–870°C. Annealing studies show that the film properties are very sensitive to the annealing temperature and annealing time. After annealing at 850°C for 48h, metallic film with Tc(Zero)=106K are obtained. X-ray diffraction shows the film to be highly c-axis orientation perpenticular to the substrate. We have reproducibly synthesized the Bi(Pb)-Sr-Ca-Cu-O thin films with Tc(Zero) at above 100K. The films were characterized by resistance measurements, X-ray diffraction, ICP-AES, Auger electron spectroscopy(AES) and scanning electron microscopy(SEM).