Thermal cycling stability of lead-alloy Josephson junctions with double layer base electrodes

In this paper, Josephson junctions with double layer base electrodes are proposed, and their thermal cycling stability is reported. The double layer base electrode has been made of a thick Nb lower film and a thin Pb-In-Au upper film prepared at 77K. The thermal cycling experiment has been carried out for 11780 junctions, and their excellent cycling stability has been observed.