Formation of a 100 K Superconducting Bi(Pb)-Sr-Ca-Cu-O Film by a Spray Pyrolysis

A 100 K superconducting Bi(Pb)-Sr-Ca-Cu-O film was formed on a MgO(100) single crystal by a spray pyrolysis method. Fifteen hours heating of the as-sprayed film at 845°C in air was enough to give the superconducting film with a T c zero higher than 100 K. An X-ray diffraction pattern showed that this film mainly consisted of the high-T c phase with the orientation of the c-axis perpendicular to the surface.