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Title: Novel gas-stabilized iron clusters: synthesis, structure and magnetic behaviour.
Authors: Crisan, O.
von Haeften, Klaus
Ellis, A.M.
Binns, C.
First Published: 17-Dec-2008
Publisher: Institute of Physics
Citation: Nanotechnology, 2008, 19 (50), 5602.
Abstract: A novel method for the synthesis of nanostructured films produced by depositing gas-phase magnetic nanoparticles is presented and the properties of the films are reported. The technique mixes metal vapour and small argon clusters produced in a supersonic expansion. The condensed clusters are subsequently deposited in situ onto copper grids. The cluster size is controlled by the vapour pressure of the metal inside the pick-up chamber. Detailed analysis of the transmission electron micrographs of the Fe clusters shows that there is a simple linear relationship between the average metal cluster diameter and the metal vapour pressure during deposition. Furthermore, the nanoparticles show a relatively narrow size distribution for a given set of experimental conditions. Structural and magnetic investigations have been performed on Fe cluster samples, and the influence of the metal vapour pressure has been studied. Detailed analysis of the magnetic and structural data has been performed and valuable information such as cluster size distributions, strength of the interparticle dipolar interactions and average magnetic moment per cluster are derived. It is shown that, at room temperature, the magnetic behaviour of the films is consistent with nanoparticle supermoments interacting via dipolar interactions.
ISSN: 0957-4484
Type: Article
Description: Full text of this item is not currently available on the LRA. The final published version is available at Doi: 10.1088/0957-4484/19/50/505602
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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