Effect on alloying at the Fe/Ni(001) interfaces on the interlayer exchange coupling |
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| Authors: | A Hadj-Larbi A Ziane S Bouarab C Demangeat |
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| Institution: | (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 |
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| 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 Fe0.5Ni0.5
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 Fe0.5Ni0.5 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. |
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| Keywords: | 75 70 Cn Magnetic properties of interfaces (multilayers superlattices heterostructures) 73 21 Ac Multilayers 75 50 Bb Fe and its alloys |
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