Multicritical behavior of the antiferromagnetic Blume-Emery-Griffiths model with the repulsive biquadratic coupling in an external magnetic field

Erdinc, Ahmet; Canko, Osman; Keskin, MUSTAFA

doi:10.1016/j.jmmm.2005.06.002

Multicritical behavior of the antiferromagnetic Blume-Emery-Griffiths model with the repulsive biquadratic coupling in an external magnetic field

Atıf İçin Kopyala

Erdinc A., Canko O., Keskin M.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, cilt.301, sa.1, ss.6-12, 2006 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 301 Sayı: 1
Basım Tarihi: 2006
Doi Numarası: 10.1016/j.jmmm.2005.06.002
Dergi Adı: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.6-12
Erciyes Üniversitesi Adresli: Evet

Özet

We have studied the antiferromagnetic Blume-Emery-Griffiths model with the repulsive biquadratic coupling in an external magnetic field using the lowest approximation of the cluster variation method which is identical to the mean-field approximation. First, we have investigated the thermal variations of the sublattice magnetizations and obtained four different main topological types. Then, we have calculated the phase diagrams and five main different phase diagram topologies are found. Finally, the discussion and comparison of the phase diagrams are made. (c) 2005 Elsevier B.V. All rights reserved.