High-frequency characterization of thin-film Y-Ba-Cu oxide superconducting transmission lines

Dykaar, Douglas R.; Sobolewski, Roman; Chwalek, James M.; Whitaker, John F.; Hsiang, Thomas Y.; Mourou, Gerard A.; Lathrop, Daniel K.; Russek, Stephen E.; Buhrman, Robert A.
April 1988
Applied Physics Letters;4/25/1988, Vol. 52 Issue 17, p1444
Academic Journal
We report the first measurements of picosecond pulse propagation on transmission lines patterned from YBa2Cu3O7-x films. Distortion-free propagation of high current density transients is demonstrated. The high-frequency properties were analyzed by careful study of the relative phase delays of the electrical transients as the temperature of the sample was varied from 1.8 K to Tc. Simulations using Mattis–Bardeen complex conductivities showed good agreement with the measured results. High-frequency critical current densities in excess of 105 A/cm2 were measured.


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