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Applications of the extended critical state model are considered. The trappedmagnetic field, the penetration field and the field dependence of the criticalcurrent density are analysed. The critical current density and the trappedfield in superconducting grains depend on the grain size. Asymmetry of thehysteresis curves relative to the M = 0 axis is related to the scale of thecurrent circulation.

Critical current density and trapped field in HTS with asymmetric magnetization loops