YBCO-bulk tunnel junctions with cadmium sulphide artificial barriers

unnel junctions consisting of a YBCO pellet electrode, a cadmium sulphide film as artificial barrier and an indium layer as counterelectrode have been fabricated. Results concerning the effect of the YBCO surface treatment and of the cadmium sulphide film thickness, both on the dV/dI characteristics and the Josephson effect occurrence are reported.