The effect of uniaxial crystal-field anisotropy on magnetic properties of the superexchange antiferromagnetic Ising model

• Veröffentlicht in: Condensed Matter Physics
• Datum: 2006
• Hauptverfasser: Canova, L., Jascur, M.
• Format: Artikel
• Sprache: Englisch
• Veröffentlicht: Інститут фізики конденсованих систем НАН України 2006
• Online Zugang: https://nasplib.isofts.kiev.ua/handle/123456789/121282
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: The effect of uniaxial crystal-field anisotropy on magnetic properties of the superexchange
 antiferromagnetic Ising model / L. Canova, M. Jascur // Condensed Matter Physics. — 2006. — Т. 9, № 1(45). — С. 47–54. — Бібліогр.: 8 назв. — англ.

The generalized Fisher super-exchange antiferromagnetic model with uniaxial crystal-field anisotropy is exactly
 investigated using an extended mapping technique. An exact relation between partition function of the
 studied system and that of the standard zero-field spin-1/2 Ising model on the corresponding lattice is obtained
 applying the decoration-iteration transformation. Consequently, exact results for all physical quantities
 are derived for arbitrary spin values S of decorating atoms. Particular attention is paid to the investigation
 of the effect of crystal-field anisotropy and external longitudinal magnetic field on magnetic properties of the
 system under investigation. The most interesting numerical results for ground-state and finite-temperature
 phase diagrams, thermal dependences of the sublattice magnetization and other thermodynamic quantities
 are discussed