CHINESE JOURNAL OF PHYSICS VOL. 40, NO. 3 JUNE 2002

Magnetic Properties of the Spin-$\frac{1}{2}$ Ising Ferromagnetic Thin Films with Alternating Superlattice Configuration

M. Bentaleb¹, N. El Aouad ¹, and M. Saber<sup>1,2

1</sup>Département de Physique, Faculté des Sciences, Université Moulay Ismail,

B.P. 4010, Meknès, Marocco
²Max-Planck-Institut für Physik Komplexer Systeme Nöthnitzer Str. 38,

D-01187, Dresden, Germany
(Received January 11, 2002)

The magnetic properties in a finite ferromagnetic superlattice are studied. The spin-$\frac{1}{2}$ Ising model with alternating intralayer parameters is used within the effective field theory, which is based on a probability distribution technique that accounts for the self-correlation function. The transition temperatures are calculated as a function of the intra- and interlayer exchange interactions and of the surface exchange interaction. The magnetization profiles are also studied.

PACS. 68.18.Jk - Phase transitions.
PACS. 75.70.Rf - Surface magnetism.
PACS. 82.45.Mp - Thin layers, films, monolayers.

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