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The spin‐3/2 blume‐capel model on a honeycomb lattice
Author(s) -
Peliti L.,
Saber M.
Publication year - 1996
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.2221950222
Subject(s) - phase diagram , condensed matter physics , lattice (music) , honeycomb , magnetization , phase transition , physics , mathematics , phase (matter) , geometry , quantum mechanics , magnetic field , acoustics
The temperature dependences of the magnetization m = 〈〈S〉〉 r and of the moments q = 〈〈 S 2 〉〉 r and r =〈〈 S 3 〉〉 r in the spin‐3/2 Blume‐Capel model on a honeycomb lattice are examined in detail, within the framework of an effective field theory based on the use of a probability distribution that correctly accounts for the single site kinematic relations. A number of characteristic behaviours for their thermal variations are obtained, especially for negative values of the crystal field. Its phase diagram is obtained; besides a second‐order transition line occurring at high temperatures, the phase diagram exhibits a first‐order transition line separating the phases (3/2, 3/2) and (1/2, 1/2).