Phase diagrams and magnetization curves of the three-dimensional spin-1 Ashkin-Teller model including metastable and unstable states

R.M. Francisco, J.J. Carvalho, G.Y. Oyadomari and J.P. Santos

Physica A: Statistical Mechanics and its Applications, 2019, vol. 531, issue C

Abstract: The ferromagnetic spin-1 Ashkin-Teller model in three dimensions is investigated by the application of the mean field approximation from the Bogoliubov inequality. Phase diagrams, magnetizations and free energy curves are presented. The states presented by the system are classified according to the critical values in the free energy of the model. Phase transitions for the stable, metastable and unstable states are observed.

Keywords: Ashkin-Teller model; Spin-1; Metastability; Cubic lattice (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:531:y:2019:i:c:s0378437119310660

DOI: 10.1016/j.physa.2019.121819

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