Artículos de revistas
Multicritical phase diagram of the three-dimensional Ashkin-Teller model including metastable and unstable phases
Fecha
2019-01-01Registro en:
Journal Of Magnetism And Magnetic Materials. Amsterdam: Elsevier Science Bv, v. 469, p. 35-39, 2019.
0304-8853
10.1016/j.jmmm.2018.08.030
WOS:000447147100007
Autor
Univ Fed Sao Joao del Rei
Universidade Estadual Paulista (Unesp)
Institución
Resumen
The mean field approximation from the Bogoliubov inequality is applied to study the ferromagnetic Ashkin-Teller model in three dimensions. Phase transitions for the stable, metastable and unstable states is observed. From the critical values in the free energy of the model, those transitions are classified. Besides the free energy, magnetization, critical frontiers and tricritical points are obtained. Phase diagram is presented for a better illustration of the phase transitions and its order.