Artículos de revistas
Tri-critical behavior of the Blume Capel model on a diamond lattice
Fecha
2017-02-01Registro en:
Journal Of Magnetism And Magnetic Materials. Amsterdam: Elsevier Science Bv, v. 423, p. 175-182, 2017.
0304-8853
10.1016/j.jmmm.2016.09.086
WOS:000397192800028
WOS000397192800028.pdf
Autor
Univ Fed Sao Joao Rei
Universidade Federal de Minas Gerais (UFMG)
Universidade Estadual Paulista (Unesp)
Institución
Resumen
The mean field approximation results are obtained in a five-site cluster on the diamond lattice from the Bogoliubov inequality. Spin correlation identities for the Blume-Capel model on diamond lattice are derived from a five-site cluster and used to obtain an effective field approximation. The free-energy, magnetization, critical frontiers and tricritical points are obtained from the mean field approximation and the effective field approximation and are compared to those obtained by other methods. From the mean-field approximation, we also studied the unstable and metastable states besides the stable states present in the model.