Volume 68, Number 2, October 2004
|Page(s)||282 - 288|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 October 2004|
Polarized neutron reflectivity on dilute magnetic alloys
Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke Universiteit Leuven Celestijnenlaan 200 D, B-3001 Leuven, Belgium
2 Hahn-Meitner-Institut - Glienicker Strasse 100, D-14109 Berlin, Germany
3 Theoretische Fysica van de Vaste Stoffen, Departement Natuurkunde Universiteit Antwerpen - Universiteitsplein 1, B-2610 Antwerpen, Belgium
Corresponding author: Johan.Swerts@fys.kuleuven.ac.be
Accepted: 25 August 2004
In order to probe the impurity spin magnetization of a thin doped (7 at.%) film, which is near the magnetic percolation limit, we measured the polarized neutron reflectivity of the film. The observed magnetic-field dependence of the magnetization indicates that atoms are partially dispersed homogeneously into the matrix and partially aggregated as clusters with typical size around 1. Our results imply that polarized neutron reflectivity can be used as a sensitive tool to probe the magnetic properties of dilute magnetic alloy films even in the absence of clustering.
PACS: 75.20.Hr – Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions / 75.30.Cr – Saturation moments and magnetic susceptibilities / 75.30.Gw – Magnetic anisotropy
© EDP Sciences, 2004
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