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

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      https://www.ias.ac.in/article/fulltext/pram/056/05/0657-0665

    • Keywords

       

      Critical state model; metastable to stable transformations; minor hysteresis loops

    • 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.

    • Author Affiliations

       

      P Chaddah1 M Manekar1

      1. Low Temperature Physics Laboratory, Centre for Advanced Technology, Indore - 452 013, India
    • Dates

       
  • Pramana – Journal of Physics | News

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