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Synthesis of Fe-Co Alloy Particles by Modified Polyol Process

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6 Author(s)
Kodama, D. ; Graduate Sch. of Environ. Studies, Tohoku Univ., Sendai ; Shinoda, K. ; Sato, K. ; Sato, Y.
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The successful synthesis of Fe-Co nanoparticles by using a modified polyol process is reported. The formation of the alloy nanoparticles was confirmed by X-ray diffraction and X-ray extended absorption fine structure analyses. The concentration of iron in these particles could be varied between 40% and 90% by controlling the reaction conditions such as initial Fe/Co ratio, reaction temperature and hydroxyl ion concentration. The shape of the particles changed from spherical to cubic when the concentration of Fe was increased from 40 to above 60 at. %. The highest magnetization of 225 emu/g was recorded for Fe70Co30 nanoparticles. The magnetization of these particles decreased by about 20% when exposed to severe oxidizing atmosphere for seven days

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Magnetics, IEEE Transactions on  (Volume:42 ,  Issue: 10 )