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Research Article | Open Access

Synthesis of High Magnetic Moment CoFe Nanoparticles via Interfacial Diffusion in Core/Shell Structured Co/Fe Nanoparticles

Chao Wang1,2,†, Sheng Peng1,†, Lise-Marie Lacroix1, Shouheng Sun1( )
Department of ChemistryBrown UniversityProvidenceRhode Island02912USA
Current Address: Materials Science DivisionArgonne National LaboratoryArgonneIL60439USA

† These two authors made an equal contribution to the work.

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Abstract

We report the synthesis of high magnetic moment CoFe nanoparticles via the diffusion of Co and Fe in core/shell structured Co/Fe nanoparticles. In an organic solution, Co nanoparticles were coated with a layer of Fe to form a Co/Fe core/shell structure. Further raising the solution temperature led to inter-diffusion of Co and Fe and formation of CoFe alloy nanoparticles. These nanoparticles have high saturation magnetization of up to 192 emu/g CoFe and can be further stabilized by thermal annealing at 600 ℃.

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CoFe nanoparticlescore/shell nanoparticlesmagnetic nanoparticleschemical synthesis

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Nano Research
Volume 2 Issue 5,
May 2009
Pages 380-385
DOI: 10.1007/s12274-009-9037-4

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Cite this article:
Wang C, Peng S, Lacroix L-M, et al. Synthesis of High Magnetic Moment CoFe Nanoparticles via Interfacial Diffusion in Core/Shell Structured Co/Fe Nanoparticles. Nano Research, 2009, 2(5): 380-385. https://doi.org/10.1007/s12274-009-9037-4

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Received: 25 December 2008
Revised: 15 February 2009
Accepted: 03 March 2009
Published: 01 May 2009
© Tsinghua University Press and Springer-Verlag 2009

This article is published with open access at Springerlink.com