A new method for a local study of nonlinear microwave properties of superconductors

Details A new method for a local study of nonlinear microwave properties of superconductors A new method for a local study of nonlinear microwave properties of superconductors

2000-05-29

arxiv.org/abs/cond-mat/0005501v1

IEEE Trans. on Appl. Supercond. 11, 131 (2001)

Physics

Condensed Matter

Superconductivity

4 pages, 5 Postscript figures

Scientific paper

We report a set of experimental data on local third-harmonic generation at microwave frequencies (0.5 GHz) in $YBa_2Cu_3O_7$ and Nb films. For local investigations of the nonlinear response a probe with inductive coupling was elaborated. The map of the nonlinear microwave response of a $YBa_2Cu_3O_7$ thin film is plotted below $T_c$ with high resolution. The third-harmonic power is measured as a function of temperature, input power and dc magnetic field at some areas of the film. The correlation between the depinning current density ${J_p}$ and the nonlinear microwave response is also demonstrated.

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