Microwave surface resistance of YBa2Cu3O6.9 superconducting films

Martens, J. S.; Beyer, J. B.; Ginley, D. S.
May 1988
Applied Physics Letters;5/23/1988, Vol. 52 Issue 21, p1822
Academic Journal
The microwave surface resistance of an YBa2Cu3O6.9 superconducting thick film was measured over the range 7.0–16.7 GHz at 77 K. This was done by placing a sample in a TE01n wavemeter cavity and observing the change in selectivity of the cavity. The material’s surface resistance is of the same order of magnitude as that of silver at 77 K from 8 to 12 GHz and improves about another order at 4.2 K. The power-law behavior of surface resistance with frequency is probably close to quadratic. This is similar to the behavior of low critical temperature superconductors.


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