FLUX INTERACTIONS ON STACKED JOSEPHSON-JUNCTIONS

Perturbation methods are used to study the dynamics of locked fluxon m odes on stacked Josephson junctions and single crystals of certain hig h-T-c, superconductors. Two limiting cases are considered: (i) The non linear diffusion regime in which fluxon dynamics are dominated by ener gy exchange between the bias and loss parameters, and (ii) the propaga ting regime in which the interplay between magnetic and electric field energies governs the fluxon dynamics. Conditions for stability of loc ked fluxon modes are shown to be different in these two regimes.