Monodispersed and highly ordered L 1 0 FePt nanoparticles preparedin the gas phase

We report the direct preparation of monodispersed L 1 0 phase FePt nanoparticles by controlled nucleation and growth using a gas phase aggregation source. These FePt nanoparticles became ordered during their growth in an argon gas flow. They are octahedron faceted with an average size of 5.8 nm and...

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Bibliographic Details
Published in:Applied physics letters 2006-05, Vol.88 (19), p.192505-192505-3
Main Authors: Qiu, Jiao-Ming, Wang, Jian-Ping
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Summary:We report the direct preparation of monodispersed L 1 0 phase FePt nanoparticles by controlled nucleation and growth using a gas phase aggregation source. These FePt nanoparticles became ordered during their growth in an argon gas flow. They are octahedron faceted with an average size of 5.8 nm and a standard size distribution of 11%, as illustrated by transmission electron microscope. Magnetic measurements show that these FePt nanoparticles have coercivities of 8.25 kOe at room temperature and 26.5 kOe at 50 K . This technique provides a novel approach for fabricating nanomaterials with controllable phase and shape in general.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2202130