Calculation of minor hysteresis loops under metastable to stable transformations in vortex matter

Details Calculation of minor hysteresis loops under metastable to stable transformations in vortex matter Calculation of minor hysteresis loops under metastable to stable transformations in vortex matter

2000-08-29

arxiv.org/abs/cond-mat/0008418v1

Physics

Condensed Matter

Superconductivity

9pages, 7 figures

Scientific paper

10.1007/s12043-001-0090-0

We present a model in which metastable supercooled phase and stable equilibrium phase of vortex matter coexist in different regions of a sample. Minor hysteresis loops are calculated with the simple assumption of the two phases of vortex matter having field-independent critical current densities. We use our earlier published ideas that the free energy barrier separating the metastable and stable phases reduces as the magnetic induction moves farther from the first order phase transition line, and that metastable to stable transformations occur in local regions of the sample when the local energy dissipation exceeds a critical value. Previously reported anomalous features in minor hysteresis loops are reproduced, and calculated field profiles are presented.

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