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

Chaddah, P. ; Manekar, M. (2001) Calculation of minor Hysteresis loops under metastable to stable transformations in vortex matter Pramana - Journal of Physics, 56 (5). pp. 657-665. ISSN 0304-4289

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Official URL: http://www.ias.ac.in/pramana/v56/p657/fulltext.pdf

Related URL: http://dx.doi.org/10.1007/s12043-001-0090-0

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.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Critical State Model; Metastable to Stable Transformations; Minor Hysteresis Loops
ID Code:84494
Deposited On:27 Feb 2012 13:10
Last Modified:19 May 2016 00:55

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