Dynamics of metastable vortex states in weakly pinned superconductors: A phenomenological model
Abstract
We present a phenomenological model for the vortex dynamics in the peak effect region of weakly pinned superconductors. We explain the history dependent dynamic response of the metastable vortex states subjected to a transport current and the hysteretic voltage-current characteristics observed in the vicinity of peak effect in weakly pinned superconductors. A strong variation in voltage current characteristics with the current sweep rate and the anomalous dependence of critical current density Jc on the magnetic field sweep rate have also been accounted for by this model.
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