Method producing an SNS superconducting junction with weak link barrier

摘要

A method of producing a high temperature superconductor Josephson element and an improved SNS weak link barrier element is provided. A YBaCuO superconducting electrode film is deposited on a substrate at a temperature of approximately 800° C. A weak link barrier layer of a nonsuperconducting film of N--YBaCuO is deposited over the electrode at a temperature range of 520° C. to 540° C. at a lower deposition rate. Subsequently, a superconducting counter-electrode film layer of YBaCuO is deposited over the weak link barrier layer at approximately 800° C. The weak link barrier layer has a thickness of approximately 50 Å and the SNS element can be constructed to provide an edge geometry junction.