Process for preparing superconducting junction of oxide superconductor

摘要

Improvement in a process for fabricating a superconducting junction by depositing successively a first oxide superconductor thin layer, a non-superconducting intermediate thin film layer and a second oxide superconductor thin film layer on a substrate in this order. In the invention, the non-superconducting intermediate thin film layer is composed of MgO and the substrate is preheated at 600 degrees-650 degrees C. for at least 5 minutes in the presence of O2, and is heated at a temperature between 200 degrees and 400 degrees C. during the non-superconducting intermediate thin film layer is deposited.