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The spin‐3/2 Blume–Emery–Griffiths model with repulsive biquadratic coupling in an external field
Author(s) -
Ekiz C.
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200402007
Subject(s) - ferrimagnetism , bethe lattice , condensed matter physics , lattice (music) , phase diagram , ferromagnetism , recursion (computer science) , coupling (piping) , physics , spin (aerodynamics) , phase (matter) , ising model , materials science , mathematics , quantum mechanics , magnetization , magnetic field , thermodynamics , algorithm , acoustics , metallurgy
The spin‐3/2 Blume–Emery–Griffiths model is solved on the Bethe lattice in the absence and presence of the external field using the iteration technique (recursion method). The phase diagrams are obtained for the coordination number q = 3, 4, 6 and 8. We confirm the existence of a staggered quadrupolar phase in addition to a ferrimagnetic and ferromagnetic ordered phases and analyze the occurence of re‐entrant boundaries inside the ordered region as a character of the coordination of the lattice. A comparison is made with the results of other approximate methods. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)