Magnetic field dependence of the critical current of tridimensional YBa2Cu3O7−δ Josephson junction arrays

Abstract In this paper, we determine the magnetic field dependence of the critical current of a tridimensional disordered Josephson junction array. A contactless configuration, employing measurements of the AC-susceptibility, is used to evaluate the average critical current of an array of YBa 2 Cu 3 O 7− δ . The critical field necessary to switch off supercurrents through the weak links at the working temperature is also obtained.