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

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

Інші назви: Ефект одновісної анізотропії кристалічного поля на магнітні властивості антиферомагнітної моделі Ізінга із суперобміном

Інший ID: PACS: 05.50.+q, 05.70.Jk, 75.10.Dg, 75.50.Ee
DOI:10.5488/CMP.9.1.47

URI: http://dspace.nbuv.gov.ua/handle/123456789/121282

Посилання: 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.

Підтримка: This work was financially supported under grants VEGA 1/2009/05 and APVT 20–005204.

Дата: 2006

Завантажень: 323

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

Анотація:

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

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