Abstract

We report the manufacturing and the properties of two types of step-edge Josephson junctions: YBCO-YBCO (SEJ) and YBCO-Au-YBCO (SNS-SEJ), respectively. The junctions were prepared on step shaped SrTiO3 substrates using in-situ pulsed laser deposition technology for film deposition and ion-etching patterning. The YBCO films used for this purpose have zero resistance transition temperature Tc(R=0) in the range (89–91) K and a critical current density Jc(B=0)>106 A/cm2 at 77 K in zero applied magnetic field. For both types of junction the I-V characteristics can be well described in the limit of the resistively shunted junction (RSJ) model.

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