AN EVALUATION OF VORTEX-OSCILLATIONS OF THE JOSEPHSON VORTEX LATTICE IN HIGH-TCSUPERCONDUCTORS

We have studied vortex lattice oscillations of the Josephson vortex lattice at small field and frequency for high TC- superconductors. We have obtained the simple relation for the dynamic dielectric constant which the perturbation of the superconducting, phase induces by the oscillating electric field. We have computed the loss-function as a function of frequency for caxis and in plane dissipation parameters. These parameters are inversely proportional to the anisotropy. This case of weak and strong dissipation are realized in Bi2Sr2CaCu2Ox and underdoped YBa2Cu3Ox respectively. We have also explored the evaluation of the loss- function with the increasing magnetic field. We observed in additional peak in the loss function below the JPR peak which was observed experimentally in underdoped YBCO. We established that this peak appears due to the frequency dependents of the in plane contribution to losses.