Onset temperature of the collective magnetic response of a tridimensional disordered Josephson junction array

In this work, measurements of AC-susceptibility, magnetic remanence and resistivity, carried out on a superconducting sample of YBa2Cu3O7-δ are presented. The sample was produced by a two-steps solid state reaction, a variation of the conventional method. AC-susceptibility and magnetic remanence measurements, carried out at different excitation fields, and resistivity measurements, conducted for a variety of values of current, reveal a unique temperature at which the weak-links cease to respond. Present results are consistent with those obtained for other systems