Multicritical Points And Reentrant Phenomenon In The BEG Model
Condensed Matter
2009-10-22 v1
Abstract
The Blume - Emery - Griffiths model is investigated by use of the cluster variation method in the pair approximation. We determine the regions of the phase space where reentrant phenomenon takes place. Two regions are found, depending on the sign of the reduced quadrupole - quadrupole coupling strength . For negative we find Para-Ferro-Para and Ferro-Para-Ferro-Para transition sequences; for positive , a Para-Ferro-Para sequence. Order parameters, correlation functions and specific heat are given in some typical cases. By-products of this work are the equations for the critical and tricritical lines.
Cite
@article{arxiv.cond-mat/9209023,
title = {Multicritical Points And Reentrant Phenomenon In The BEG Model},
author = {Carla Buzano and Alessandro Pelizzola},
journal= {arXiv preprint arXiv:cond-mat/9209023},
year = {2009}
}
Comments
14 pages, figures available upon request