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Phase transitions in two‐sublattice biquadratic systems (S = 3/2)
Author(s) -
Błaszczak E.,
Westwański B.
Publication year - 1979
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.2220940210
Subject(s) - condensed matter physics , paramagnetism , limit (mathematics) , physics , magnetic susceptibility , phase transition , phase (matter) , dipole , quantum mechanics , mathematics , mathematical analysis
The (1/ z ) 0 ‐ and (1/ z ) 1 ‐approximations are confronted for (1) dipolar susceptibility in the ferri‐antiquadrupolar limit for the Blume‐Emery‐Griffiths interactions, (2) antiquadrupolar susceptibility in the paramagnetic limit for the purely quadrupolar Blume‐Emery‐Griffiths and Heisenberg biquadratic interactions. The critical temperature in the first case is shown to be different than in the corresponding one‐sublattice situation (ferro‐quadrupolar limit). In the second case the critical temperature is compatible with that arising from (one‐sublattice) quadrupolar susceptibility in the paramagnetic limit.