Research Article

Nano Research

, Volume 2, Issue 5, pp 380-385

Open Access This content is freely available online to anyone, anywhere at any time.

Synthesis of high magnetic moment CoFe nanoparticles via interfacial diffusion in core/shell structured Co/Fe nanoparticles

  • Chao WangAffiliated withDepartment of Chemistry, Brown University
  • , Sheng PengAffiliated withDepartment of Chemistry, Brown University
  • , Lise-Marie LacroixAffiliated withDepartment of Chemistry, Brown University
  • , Shouheng SunAffiliated withDepartment of Chemistry, Brown University Email author 

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 °C.

http://static-content.springer.com/image/art%3A10.1007%2Fs12274-009-9037-4/MediaObjects/12274_2009_9037_Fig1_HTML.jpg

Keywords

CoFe nanoparticles core/shell nanoparticles magnetic nanoparticles chemical synthesis