Development of High-Entropy Alloys with Optimized, Rare-Earth-Free Magnetocaloric ...
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Study of the magnetocaloric effect in intermetallic compounds
Full text | |
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 |