CRITICAL CURRENTS AND RELAXATION IN JOSEPHSON MEDIA

The main aim of this paper is to show that Josephson critical current I-c stability to high magnetic fields H >> H-cl tends to hysteretic re laxation rate of the Josephson media critical current J(c)(t) and prod uces a change in the Ferrell-Prange equation. In the framework of the discussed model, the reason for J(c)(t) vs. H hysteresis lies in the i rreversible dependence of the granule surface current. It is shown tha t the effective intergranular field H-g in Josephson media plays a sec ondary role at these fields.