Zm. Wen et H. Abe, YBA2CU3O7-DELTA AG BI-EPITAXIAL GRAIN-BOUNDARY JUNCTIONS FOR FLUX-FLOW DEVICES/, Superconductor science and technology, 9(4A), 1996, pp. 76-78
We have successfully achieved high-T-c superconducting Josephson junct
ions using bi-crystal YBa2Cu3O7-delta (YBCO)/Ag films for the first ti
me. Utilizing a chemical vapour deposition (CVD) method, the YBCO/Ag f
ilms were formed onto SrTiO3 bi-crystal substrates. The addition of th
e Ag changed electric properties of the grain boundaries in the YBCO s
uperconductor and the fabricated junctions showed reproducible Josephs
on behaviour. The response to applied magnetic field exhibited transis
tor characteristics based on Josephson flux-(vortex-) flow phenomena.