Static properties and current steps in one-dimensional parallel arrays of Josephson tunnel junctions in the presence of a magnetic field

Static and dynamical states in one-dimensional parallel arrays of small, all refractory Josephson tunnel junctions, are experimentally investigated at 4.2 K. The dependence of the maximum Josephson current on the applied magnetic field in parallel arrays shows asymmetric behavior around secondary maxima which are discussed in terms of a nonuniform applied magnetic field, Current steps and linear branches induced by the applied magnetic field are observed together in the current-voltage characteristics for the first time in the strongly underdamped regime. The resonant structures appearing in the current-voltage characteristics of the arrays show features similar to high-order Fiske modes in a long Josephson junction. (C) 1995 American Institute of Physics.