Coevaporation of CoPt nanoparticles

Co 50 Pt 50 nanoparticles were codeposited on thermally oxidized Si substrates by electron beam evaporation, at a temperature of the substrate of 700 to 750 ° C . The codeposition led to a perfect mixture of the Co and Pt elements within the three-dimensional nanoislands, which exhibit a mean diamet...

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Bibliographic Details
Published in:Applied physics letters 2004-10, Vol.85 (14), p.2854-2856
Main Authors: Castaldi, L., Giannakopoulos, K., Travlos, A., Niarchos, D.
Format: Article
Language:English
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Summary:Co 50 Pt 50 nanoparticles were codeposited on thermally oxidized Si substrates by electron beam evaporation, at a temperature of the substrate of 700 to 750 ° C . The codeposition led to a perfect mixture of the Co and Pt elements within the three-dimensional nanoislands, which exhibit a mean diameter between ∼ 18 and ∼ 20 nm . The postannealing treatment of the CoPt nanograins resulted in the progressive crystallization of the L 1 0 ordered phase and, consequently, in the progressive magnetic hardening of the samples with a maximum coercivity of ∼ 5.6 kOe .
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1802378