Intergranular critical state in uniform Josephson junction arrays

D. X. Chen, A. Sanchez, A. Hernando

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13 Citations (Scopus)

Abstract

Static intergranular magnetization curves of uniform slab-like Josephson junction arrays with a large junction-critical-current, Imax, and/or a large void area, AV, are calculated as the fully relaxed solutions of a set of DC and AC Josephson equations with gauge-invariant phase differences. The curves always have an oscillatory component. When μ0AVImax/φ0 > 0.5, they are very similar to those calculated from the critical-state model of constant Jc. In this case, there are many possible static states under each given field, the intergranular critical state is the most effective static shielding state with a regional feature selected by dynamic shielding during previous field change. The implications of the results for the mechanism of the intergranular critical state in high-Tc superconductors are discussed. © 1995.
Original languageEnglish
Pages (from-to)107-120
JournalPhysica C: Superconductivity and its Applications
Volume250
Issue number1-2
DOIs
Publication statusPublished - 1 Aug 1995

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