Method for producing a layer-like composition of oxide-ceramic superconducting material

A method for manufacturing a layer-like composition of an oxide-ceramic superconductive material with a high transition temperature and large current-carrying capacity on the basis of a material system containing metallic components and oxygen, in which method the metallic components of the system are applied in a physical deposition process and while oxygen is supplied on a predetermined substrate as a preliminary product with a structure which still is disordered with respect to the superconducting metal oxide phase to be formed, which structure is converted, using a heat treatment and while oxygen continues to be supplied, into the desired superconducting oxide phase, the method comprising the steps of applying a multilayer layer of the superconducting material on a fine-crystalline substrate the steps of applying comprising first, forming successive layers of individual films with a respective film thickness under 10 nm, the step of forming each of these films comprising the steps of:

• applying the metallic components of the system to the respectively provided underlayer by means of the physical deposition process and while supplying oxygen at a temperature below 400.degree. C. and
• converting the so obtained preliminary product by means of short thermal pulses into an intermediate product with a columnar structure which exhibits columns densely packed and c-axes standing at least approximately perpendicularly to the respective underlayer, an then forming the desired superconducting metal oxide phase in the intermediate products of all films by means of further oxygen supply and at a temperature below 400.degree. C.