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

Abstract

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.

9pages, 7 figures

References in corpus (5)

• Supercooling of the disordered vortex lattice in Bi_2Sr_2CaCu_2O_8+d
• Plasticity and memory effects in the vortex solid phase of twinned YBa2Cu3O7 single crystals
• Supercooling across first-order phase transitions in vortex matter
• A study of supercooling of the disordered vortex phase via minor hysteresis loops in 2H-NbSe_2
• Peak effect in CeRu${}_2$:history dependence and supercooling