Magnetic phase transition in antiferromagnetic films

被引：12

作者：

Masrour, R. ^{[1
]}

Hamedoun, M. ^{[1
,2
,3
]}

Benyoussef, A. ^{[3
,4
,5
]}

机构：

[1] Sidi Mohammed Ben Abdellah Univ, Fac Sci, Solid State Phys Lab, Fes, Morocco

[2] Expert Aupres Acad Hassan Sci & Tech, Rabat, Morocco

[3] Inst Nanomat & Nanotechnol, Rabat, Morocco

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

[5] Acad Hassan Sci & Tech, Rabat, Morocco

来源：

PHYSICS LETTERS A | 2009年 / 373卷 / 23-24期

关键词：

High-temperature series expansions; Antiferromagnetic; Pade approximant; Neel temperatures; Correlation length exponent; ISING THIN-FILMS; SPIN-1/2; HEISENBERG-ANTIFERROMAGNET; SERIES-EXPANSION TECHNIQUE; CRITICAL EXPONENTS; NEEL TEMPERATURE; ULTRATHIN FILMS; MONTE-CARLO; FINITE-SIZE; SURFACE; MODEL;

D O I：

10.1016/j.physleta.2009.04.003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The susceptibility of body-centered cubic lattice (bcc) antiferromagnetic spin-1/2 through two model: Ning and XY films consisting of n = 2. 3, 4. 5, and 6 interacting layers is studied by high-temperature series expansions. Sixth order series in x = beta J (beta = 1/kappa(B)T) have been obtained for free-surface boundary conditions. The high temperature series expansion B of the magnetic susceptibility series has been investigated by using the Pade approximant method. The Neel temperatures T(N)(n) as a function of the number of n spin layers in the films is obtained. The critical exponent gamma associated with the magnetic susceptibility is deduced for Ising and XY models. The shifts of the critical temperatures from the bulk value [T(N)(infinity)/T(N)(n) - 1] can be described by a power law n(-lambda), with lambda = 1/nu where nu is the correlation length exponent. (C) 2009 Published by Elsevier B.V.

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页码：2071 / 2074

页数：4

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