Magnetic properties of Ak(ApB1-p)1Bh superlattices containing alloy disordered interfaces in a spin-1/2 model

A. Khater, M. Abou Ghantous, M. Fresneau

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

An Ising model is presented for a simple cubic-type structure, to determine the magnetic properties for superlattices of periodic Ak (ApB1-p)1Bh formula consisting of k layers of spin-1/2 A ions, h layers of spin-1/2 B ions and single layer disordered alloy interfaces between them. The interface layers are characterized by random arrangements of A and B ions so that (ApB1-p)1 is a two-dimensional thermodynamically stable alloy. The magnetic properties studied concern notably the phase diagrams and the sublattice magnetizations of these systems. The model is general and can be used for ferro- or anti-ferromagnetic A-B exchange couplings. In this paper the A-A and B-B exchange couplings are considered ferromagnetic with no loss of generality. An effective field theory is employed to calculate the properties of these systems. We apply the method to various Fek(Fep Tb1-p)1 Tbh superlattices. The needed exchange constants for the two-dimensional alloy interface are calculated in the framework of this model, and used to calculate these properties for different concentrations 0 ≤ p ≤ 1, for these superlattices. The architecture and concentration dependence of the magnetic properties is an important feature of this paper, allowing a useful experimental analysis of similar systems.

Original languageEnglish
Pages (from-to)951-956
Number of pages6
JournalJournal of Physics D: Applied Physics
Volume35
Issue number10
DOIs
Publication statusPublished - 21 May 2002
Externally publishedYes

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Superlattices
superlattices
Magnetic properties
Exchange coupling
Ions
magnetic properties
Ising model
ions
Phase diagrams
Magnetization
sublattices
phase diagrams
magnetization

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Magnetic properties of Ak(ApB1-p)1Bh superlattices containing alloy disordered interfaces in a spin-1/2 model. / Khater, A.; Ghantous, M. Abou; Fresneau, M.

In: Journal of Physics D: Applied Physics, Vol. 35, No. 10, 21.05.2002, p. 951-956.

Research output: Contribution to journalArticle

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