Mean-field solution of the mixed spin-1 and spin-3/2 Ising system with different single-ion anisotropies

被引：104

作者：

Abubrig, OF ^{[1
]}

Horváth, D ^{[1
]}

Bobák, A ^{[1
]}

Jascur, M ^{[1
]}

机构：

[1] Safarik Univ, Fac Sci, Dept Theoret Phys & Geophys, Kosice 04154, Slovakia

来源：

PHYSICA A | 2001年 / 296卷 / 3-4期

关键词：

mixed-spin Ising model; ferrimagnet; single-ion anisotropy; compensation point;

D O I：

10.1016/S0378-4371(01)00176-5

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The mixed spin-1 and spin-3/2 Ising ferrimagnetic system with different anisotropies is studied within the mean-field theory based on Bogoliubov inequality for the Gibbs free energy. Global phase diagrams are obtained in the temperature-anisotropy plane. In particular we find first-order transition lines separating different low-temperature ordered phases (characterized by different values of the sublattice magnetizations) each one terminating at an isolated critical point. The existence and dependence of a compensation temperature on single-ion anisotropies is also investigated. (C) 2001 Elsevier Science B.V. All rights reserved.

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页码：437 / 450

页数：14

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