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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Magnetocaloric effect in the Potts model based on the effective-field theory

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Author(s):
Morais, R. H. M. [1] ; Santos, J. P. [1, 2] ; Oliveira, S. [1, 3] ; Mendes, R. G. B. [1] ; Rosa, D. S. [4] ; Francisco, R. M. [1] ; Barreto, F. C. Sa [5]
Total Authors: 7
Affiliation:
[1] Univ Fed Sao Joao del Rei, Dept Ciencias Nat, CP 110, BR-36301160 Sao Joao Del Rei, MG - Brazil
[2] Univ Fed Sao Joao del Rei, Dept Matemat, CP 110, BR-36301160 Sao Joao Del Rei, MG - Brazil
[3] Inst Fed Minas Gerais, Dept Ciencias & Linguagens, Bambui - Brazil
[4] Inst Tecnol Aeronaut, Dept Fis, BR-12228900 Sao Jose Dos Campos, SP - Brazil
[5] Univ Fed Minas Gerais, Dept Fis, CP 110, BR-31270901 Belo Horizonte, MG - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Physics Letters A; v. 424, FEB 6 2022.
Web of Science Citations: 0
Abstract

This work investigates the characteristics of the magnetocaloric effect in the first-order phase transitions of the q state Potts model, using the Effective Field Theory in a lattice with coordination number z = 6. The Maxwell relations were used to study the equilibrium behavior of the thermodynamic quantities and the Clausius-Clapeyron was associated with it in the cases with discontinuity in the order parameter of the model. The starting point is a detailed analysis of magnetic properties as a function of temperature and external field. From there, the first-order phase transitions were studied, related to temperatures and external transition fields in the temperature ranges that present first-order phase transitions. Next, we present results of the magnetocaloric effects for the states q = [2, 3, 4, 6], considering the first-order phase transitions with the system in equilibrium. The results showed convergence with others obtained from theoretical and experimental data. (C) 2021 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 20/00560-0 - Dimensional aspects of few-body physics
Grantee:Dérick dos Santos Rosa
Support Opportunities: Scholarships in Brazil - Post-Doctoral