Oscillating pattern in the vortex matterM. Gitterman, B. Ya. Shapiro and I. Shapiro
Department of Physics, Institute of Superconductivity, Bar-Ilan University Ramat-Gan 52900, Israel
received 30 July 2006; accepted in final form 24 October 2006
published online 23 November 2006
We present a theory for the oscillating instability of the vortex matter experimentally observed in Bi2Sr2CaCu2O8+d crystals. The basic framework is a flux dynamics instability in the vicinity of the coexistence line of the order-disorder vortex phase transition. A theoretical description of this effect is based on two coupled equations: the Landau-Ginzburg equation for the order parameter of the vortex phase transition and the diffusion equation for the magnetic induction. Linear stability analysis of these equations reveals an oscillatory instability giving rise to waves and characterized by a period and wavelength that are in accordance with the experimental results.
74.25.Qt - Vortex lattices, flux pinning, flux creep.
74.62.Dh - Effects of crystal defects, doping and substitution.
76.60.Es - Relaxation effects.
© EDP Sciences 2006