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.
机构:
Northeastern Univ, Coll Sci, Shenyang 110004, Peoples R China
Liaoning Univ Petr & Chem Technol, Coll Sci, Fushun 113001, Peoples R ChinaNortheastern Univ, Coll Sci, Shenyang 110004, Peoples R China
Shi, Xiaoling
Wei, Guozhu
论文数: 0引用数: 0
h-index: 0
机构:
Northeastern Univ, Coll Sci, Shenyang 110004, Peoples R China
Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R ChinaNortheastern Univ, Coll Sci, Shenyang 110004, Peoples R China