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Title: Diffusionless phase transition with two order parameters in spin-crossover solids

The quantitative analysis of the interface boundary motion between high-spin and low-spin phases is presented. The nonlinear effect of the switching front rate on the temperature is shown. A compressible model of spin-crossover solid is studied in the framework of the Ising-like model with two-order parameters under statistical approach, where the effect of elastic strain on interaction integral is considered. These considerations led to examination of the relation between the order parameters during temperature changes. Starting from the phenomenological Hamiltonian, entropy has been derived using the mean field approach. Finally, the phase diagram, which characterizes the system, is numerically analyzed.
Authors:
;  [1] ;  [2]
  1. Department of General Physics, Chernivtsi National University, 58012 Chernivtsi (Ukraine)
  2. Groupe d'Etude de la Matière Condensée (GEMAC), UMR 8635, CNRS, Université de Versailles Saint Quentin, 45 avenue des Etats-Unis, 78035 Versailles (France)
Publication Date:
OSTI Identifier:
22402584
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 17; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ENTROPY; HAMILTONIANS; INTERFACES; MEAN-FIELD THEORY; NONLINEAR PROBLEMS; ORDER PARAMETERS; PHASE DIAGRAMS; PHASE TRANSFORMATIONS; SOLIDS; STRAINS