An introduced effective-field theory study of spin-1 transverse Ising model with crystal field anisotropy in a longitudinal magnetic field

被引：21
|
作者：
Yuksel, Yusuf [1 ,2 ]
Polat, Hamza [1 ]
机构：
[1] Dokuz Eylul Univ, Dept Phys, TR-35160 Izmir, Turkey
[2] Dokuz Eylul Univ, Grad Sch Nat & Appl Sci, TR-35160 Izmir, Turkey
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2010年 / 322卷 / 24期
关键词：
Ferromagnetism; IEFT; Order parameters; Spin-1; TIM; PHASE-DIAGRAMS; ORDER PARAMETERS; APPROXIMATION; TRANSITIONS; SYSTEMS;
D O I：
10.1016/j.jmmm.2010.08.018
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A spin-1 transverse Ising model with longitudinal crystal field in a longitudinal magnetic field is examined by introducing an effective field approximation (IEFT) which includes the correlations between different spins that emerge when expanding the identities. The effects of the crystal field as well as the transverse and longitudinal magnetic fields on the thermal and magnetic properties of the spin system are discussed in detail. The order parameters, Helmholtz free energy, entropy and specific heat curves are calculated numerically as functions of the temperature and Hamiltonian parameters. A number of interesting phenomena such as reentrant phenomena originating from the temperature, crystal field, transverse and longitudinal magnetic fields have been found. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：3907 / 3916
页数：10
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