Er. Palenque et al., EXPERIMENTAL-EVIDENCE OF NONLINEAR BEHAVIOR IN YBCO SUPERCONDUCTING THIN-FILMS, Superconductor science and technology, 8(5), 1995, pp. 279-281
Preliminary measurements of the non-linear dynamics of a thin (two dim
ensional) YBa2Cu3O7 superconducting film in a small AC magnetic field
are presented. A peak in third harmonic generation which may provide e
vidence of the Kosterlitz-Thouless transition is found just below the
superconducting transition temperature.