S. Miura et al., PROPERTIES OF A YBCO INSULATOR/YBCO TRILAYER AND ITS APPLICATION TO AMULTILAYER JOSEPHSON-JUNCTION/, Superconductor science and technology, 9(4A), 1996, pp. 59-61
We have examined the properties of a trilayer high-temperature superco
nductor (HTS)/insulator/HTS structure and incorporated this structure
with multilayer Josephson ramp edge junctions to form a SQUID with a g
round plane. The lower and upper Y1Ba2Cu3Ox (YBCO) films in the trilay
er structure showed zero-resistance temperatures of 89 K and 85 K resp
ectively. A directly coupled ground-planed SQUID using ramp edge Josep
hson junctions with a normal barrier layer Pr1Ba2Cu3Ox (PBCO) Showed a
voltage modulation of 30 mu V at 9 K and operated up to 50 K.