Title
Ferromagnetic phases due to competing short- and long-range interactions in the spin-5/2 and spin-2 Blume–Capel model
Date Issued
23 November 2018
Access level
open access
Resource Type
journal article
Author(s)
Neto M.A.
Dinóla Neto F.
Murillo Pariona D.A.
Universidade Federal do Amazonas,
Publisher(s)
Elsevier B.V.
Abstract
We broaden the study of the statistical physics of the spin-S Blume–Capel model with ferromagnetic mean-field interactions J in competition with short-range antiferromagnetic interactions K in a linear chain in the thermodynamic limit. This work is dedicated to the case when S takes the half-integer spin S=5/2 and when S assumes the integer value S=2. In both cases the phase diagrams exhibit new ferromagnetic phases (for certain values of K) enclosed by branches emerging from the first-order frontiers of the pure ferromagnetic model. For finite temperatures the complex topologies were obtained by numerical minimization of the free energy and some results were confirmed by Monte Carlo simulations.
Start page
3325
End page
3332
Volume
382
Issue
46
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Scopus EID
2-s2.0-85052997540
Source
Physics Letters, Section A: General, Atomic and Solid State Physics
ISSN of the container
03759601
Sponsor(s)
Financial support from CNPq and FAPEAM (Brazilian agencies) is acknowledged. We also thank to the computational resources of CENAPAD-SP (Centro Nacional de Processamento de Alto Desempenho em São Paulo), project UNICAMP/FINEP-MCT, and to LFCAD (Laboratório de Física Computacional de Alto Desempenho) of the Statistical Mechanics and Complex Systems group of UFAM.
Sources of information: Directorio de Producción Científica Scopus