Jh. Miller et al., PHASE COHERENCE IN THE HYSTERETIC MAGNETIC-BEHAVIOR OF PARALLEL JOSEPHSON-JUNCTION ARRAYS, Physical review. B, Condensed matter, 49(21), 1994, pp. 15317-15321
We report on the hysteretic field-dependent critical currents of large
inductance arrays with up to ten YBa2Cu3O7 grain-boundary junctions i
n parallel. A peak in the critical current, roughly equal to its initi
al zero-field value, is observed after each reversal of the field swee
p. This behavior indicates that the junction phases become equal modul
o 2pi (self-organized phase coherence) as the system relaxes away from
the critical state. The primary features can be modeled using a Frenk
el-Kontorova model generalized to include global interactions due to m
utual inductance.