We report a set of experimental data on local third-harmonic generation at microwave frequencies (0.5 GHz) in YBa2Cu3O7 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 YBa2Cu3O7 thin film is plotted below Tc 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 Jp and the nonlinear microwave response is also demonstrated.
@article{arxiv.cond-mat/0005501,
title = {A new method for a local study of nonlinear microwave properties of superconductors},
author = {Evgeny E. Pestov and Yury N. Nozdrin and Vladislav V. Kurin},
journal= {arXiv preprint arXiv:cond-mat/0005501},
year = {2007}
}