Title :
Fabrication and characterization of YBa2Cu3O 7/Au/YBa2Cu3O7 Josephson junctions
Author :
Forrester, M.G. ; Talvacchio, J. ; Gavaler, J.R. ; Rooks, M. ; Lindquist, J.
Author_Institution :
Westinghouse Electr. Corp., Pittsburgh, PA, USA
fDate :
3/1/1991 12:00:00 AM
Abstract :
All-high-Tc Josephson junctions have been fabricated in a planar SNS geometry by bridging narrow gaps (≈0.1-0.2 μm) in epitaxial YBa2Cu3O7 (YBCO) films with Au. The resulting devices exhibit a variety of nonhysteretic I-V characteristics, with IcR N on the order of 0.1 to 10 mV, and exhibit Shapiro steps under microwave irradiation, and weak periodic modulation of the critical current with applied magnetic field. The transport properties of the junctions appear to be dominated by the Au/YBCO interfaces rather than by the Au itself
Keywords :
Josephson effect; barium compounds; gold; high-temperature superconductors; superconducting junction devices; yttrium compounds; 0.1 to 0.2 micron; 0.1 to 10 mV; Josephson junctions; Shapiro steps; YBa2Cu3O7-Au-YBa2Cu 3O7; applied magnetic field; bridging narrow gaps; characterization; fabrication; high temperature superconductors; microwave irradiation; nonhysteretic I-V characteristics; planar SNS geometry; weak periodic modulation; Etching; Fabrication; Gold; Ion beams; Lithography; Milling; Particle beams; Resists; Temperature; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
