TRANSPORT-PROPERTIES OF A 3-DIMENSIONAL ARRAY OF JOSEPHSON-JUNCTIONS IN A MAGNETIC-FIELD

We calculate numerically the behavior of a model high-temperature supe rconductor described by a three-dimensional array of Josephson junctio ns in the presence of an external magnetic field using dynamical Lange vin simulations in the extreme type-II case. In particular, the voltag e generated when an external current is applied, and its dependence on the external field and thickness of the sample are discussed. We find that the ab-plane resistivity is well described by a thermal activati on model, whereas the c-axis resistivity appears for higher temperatur es. To make connection with recent experiments, the response to nonhom ogeneous applied currents is also discussed.