COMPOSITE VORTEX MODEL OF THE ELECTRODYNAMICS OF TYPE-II SUPERCONDUCTORS

A phenomenological model of vortex dynamics is presented in which the vortex is taken as a composite object with two components: the vortex current pattern, which is massless and driven by the Lorentz force, an d the vortex core, which is massive and driven by the Magnus force. By combining the characteristics of the Gittleman-Rosenblum model [Phys. Rev. Lett. 16, 734 (1996)] and Hsu's theory of vortex dynamics [Physi ca C 213, 305 (1993)], the model provides a good description of the ma gnetoconductivity tensor of superconducting YBa2Cu3O7-delta films meas ured over the frequency range from the microwave to 200 cm(-1).