Bethe lattice approach study of the mixed spin-1/2 and spin-7/2 Ising model in a longitudinal magnetic field

被引：6

作者：

Eddahri, S. ^{[1
]}

Karimou, M. ^{[2
]}

Razouk, A. ^{[1
,3
]}

Hontinfinde, F. ^{[2
,4
]}

Benyoussef, A. ^{[5
,6
]}

机构：

[1] Sultan Moulay Slimane Univ, Fac Sci & Technol, Phys Mat Lab, Beni Mellal, Morocco

[2] IMSP, Akpro Misserete, Benin

[3] Sultan Moulay Slimane Univ, Polydisciplinary Fac, Dept Phys, Beni Mellal, Morocco

[4] Univ Abomey Calavi, Dept Phys, Cotonou, Benin

[5] Mohammed V Univ, LMPHE, Fac Sci, Rabat, Morocco

[6] Hassan II Acad Sci & Technol, Rabat, Morocco

来源：

CONDENSED MATTER PHYSICS | 2018年 / 21卷 / 01期

关键词：

Ising model; magnetization; response function; free energy; phase diagram; second-order transition; SPIN-5/2 BEG MODEL; FERRIMAGNETIC SYSTEM; MONTE-CARLO; MEAN-FIELD; RENORMALIZATION-GROUP; TRICRITICAL BEHAVIOR; HYSTERESIS LOOPS; SQUARE LATTICE; SPIN-3/2; OPPORTUNITIES;

D O I：

10.5488/CMP.21.13705

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The magnetic properties of the mixed spin-1/2 and spin-7/2 Ising model with a crystal-field in a longitudinal magnetic field are investigated on the Be the lattice using exact recursion relations. The ground-state phase diagram is constructed. The temperature-dependent one is displayed in the case of uniform crystal-field on the (k(B)T/vertical bar J vertical bar,D/vertical bar J vertical bar) plane in the absence of the external constraint for lattice coordination numbers z = 3; 4, 6. The order parameters and corresponding response functions as well as the internal energy are calculated and examined in detail in order to feature the real nature of phase boundaries and corresponding temperatures. The thermal variations of the average magnetization are classified according to the Neel nomenclature.

引用

页数：16

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