Process for making a film of a metal oxide superconductive material having a high critical temperature, and device for carrying out this process

Abstract

Abstract The process can be used to make a film of a metal oxide superconductive material having high critical temperature. A film of a metal oxide precursor consisting of the components of the material and still having an incorrect crystal structure is first applied to a substrate. The desired superconductive metal oxide phase is then formed by means of a heat treatment and oxygen treatment, a critical current density in the film parallel to the surface of the film being greater than that in the direction normal to the film. It is intended to improve the process in such a way that the critical current density is increased further. For this purpose, the invention makes provision for the precursor (V) to be moved at a predetermined velocity (v) parallel to the surface of the film (3) through a heated zone (14) in which a positive maximum temperature gradient ( DELTA T/ DELTA x), measured in the direction of movement, of not less than 5 K/mm, preferably from not less than 10 to 50 K/mm, is developed. <IMAGE>

Inventors

• 👤 Jörg Dr. Kieser

Bibliographic Details