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Title: Structure and magnetic properties of Fe/Fe oxide clusters
Authors: Crisan, O.
von Haeften, Klaus
Ellis, A. M.
Binns, C.
First Published: Dec-2008
Publisher: Springer Verlag
Citation: Journal of Nanoparticle Research, 2008, 10 (supp.1), pp. 193-199.
Abstract: Fe clusters have been synthesised in ultra-high-vacuum chamber using a gas-stabilized cluster aggregation method that ensures good control of the cluster size and naturally oxidized in order to obtain Fe/Fe oxide core-shell nanoparticles. The morphology of an individual nanoparticle, as revealed by transmission electron microscopy, consists of a Fe core of an average diameter of 4.4 nm surrounded by an oxide shell of uniform thickness of about 1.2 nm in average. The nanoparticles may be assimilated with a ferro-/antiferromagnetic (FM/AF) system. The morpho-structural features have been correlated with magnetic measurements on the core-shell nanoparticles. A significant exchange bias effect has been measured, when the sample was field-cooled under an applied field of 3 T. As the morphology of core-shell nanoclusters is much more complicated than in FM/AF bilayers of regular thickness due to the particular geometry of the coronal AF layer, the shape and surface anisotropy have to be taken into account for a correct interpretation of the magnetic data.
DOI Link: 10.1007/s11051-008-9463-3
ISSN: 1388-0764
Type: Article
Description: This paper was published as Journal of Nanoparticle Research, 2008, 10 (supp.1), pp. 193-199. It is available from Doi: 10.1007/s11051-008-9463-3
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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