Interface magnetic anisotropy in cobalt clusters embedded in a platinum matrix

Noninteracting cobalt clusters containing almost one thousand atoms are embedded in a platinum matrix using a co-deposition technique. This one allows us to prepare nanostructured films from miscible elements such as Co/Pt. Deposited clusters keep a pure cobalt core surrounded with an alloyed CoPt i...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2001-12, Vol.237 (3), p.293-301
Main Authors: Jamet, M, Négrier, M, Dupuis, V, Tuaillon-Combes, J, Mélinon, P, Pérez, A, Wernsdorfer, W, Barbara, B, Baguenard, B
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Interface effects
Interfacial magnetic properties (multilayers, magnetic quantum wells, superlattices, magnetic heterostructures)
Magnetic nanoclusters
Magnetic properties and materials
Magnetic properties of nanostructures
Magnetic properties of surface, thin films and multilayers
Metals. Metallurgy
Physics
Surface anisotropy
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Summary:Noninteracting cobalt clusters containing almost one thousand atoms are embedded in a platinum matrix using a co-deposition technique. This one allows us to prepare nanostructured films from miscible elements such as Co/Pt. Deposited clusters keep a pure cobalt core surrounded with an alloyed CoPt interface. Magnetic measurements performed on this cluster assembly reveal a very strong interface anisotropy. Moreover, we find that a simple core-shell model can account for the observed anomalous temperature dependence of the cluster magnetization.
ISSN:0304-8853
DOI:10.1016/S0304-8853(01)00695-3