Abstract

In order to analyze the diamagnetic properties of sintered granular superconductors, a circuital model consisting of a network of identical inductances ( L 0) and Josephson junctions is developed. In particular, the case of sufficiently high values of the maximum Josephson currents ( I j), such that L 0 I j ⪢ Φ 0, is considered. Neglecting thermal activation processes, the process of irreversible penetration of flux quanta is studied numerically. A critical state model follows.

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