Degenerate Blume-Emery-Griffiths model for the martensitic transformation

Eduard Vives, Teresa Castán, Per-Anker Lindgård
1996 Physical Review B (Condensed Matter)  
A generalization of the Blume-Emery-Griffiths model is introduced in which an entropy stabilization of the high-temperature phase is controlled by a degeneracy parameter pу1. The model describes a first-and a second-order phase transition as a function of temperature between two ordered phases. This is relevant for the martensitic transition problem. Mean-field calculations and Monte Carlo simulations are presented. The model predicts a constant entropy change at the transition for various
more » ... ition temperatures in agreement with the behavior found experimentally.
doi:10.1103/physrevb.53.8915 pmid:9982393 fatcat:u53biqaesvdkbjpsmarxkogj4u