Microwave complex response in superconducting thin films in magnetics fields

Abstract

The electrical complex resistivity in the mixed state of various epitaxial films of superconducting cuprates is studied by means of microwave resonating technique. The microwave response of various cuprates in the mixed state has been extensively studied, also by developing an upgrade of the experimental setup. It is seen that by considering vortex motion only it is not possible to take into account the observed behaviour. Several peculiar aspects of HTCS, such as low-energy excitations and vortex matter transformations, appear to play major roles in the measured response.