Eur. Phys. J. B 53, 29-34 (2006)
https://doi.org/10.1140/epjb/e2006-00339-x

Effect on alloying at the Fe/Ni(001) interfaces on the interlayer exchange coupling

¹ Laboratoire de Physique et Chimie Quantique, Université Mouloud Mammeri de Tizi-Ouzou, 15000 Tizi-Ouzou, Algeria
² Institut de Physique et Chimie des Matériaux de Strasbourg, B.P. 43, 23, rue du Loess, 67034 Strasbourg Cedex 2, France

Corresponding author: ^a hadjlarbi@yahoo.com

Received: 25 April 2006
Revised: 4 August 2006
Published online: 6 September 2006

Abstract

We investigate the stability of various ordered FeNi alloys at the interfaces of Fe/Ni superlattices by using ab initio density functional calculation. We consider an Fe_0.5Ni_0.5 ordered alloy of one or two monolayers thick at different positions beyond the interface and the possibility of an interdiffusion of a complete monolayer of Ni(Fe) in Fe(Ni) slab. An interfacial atomic layer of Fe_0.5Ni_0.5 exchanged with its adjacent Ni monolayers, leading to a buffer zone of Ni₃Fe composition is found to be the most stable structural configuration. For this atomic arrangement we investigate the magnetic profile and the resulting interlayer exchange coupling between the Ni slabs for Fe spacer thickness of 0 to 4 monolayers.