In-situ fabrication of SNS junctions consisting of YBaCuO/PrBaCuO/YBaCuO structures

The fabrication of all-oxide superconductor-normal metal-superconductor junction structures by the in-situ deposition of YBaCuO/PrBaCuO/YBaCuO trilayer films on a (100)MgO single crystal substrate is discussed. The junctions were patterned on the substrate using a conventional photolithographic technique. A gold layer was also deposited on the surface of the trilayer films to eliminate the influence of moisture and photoresist process. Experimental results show that the structures have a supercurrent with a small resistance connected in series to the junctions.