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 ...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℃.展开更多
基金NSF/DMR 0606264,ONR/MURI N00014-05-1-0497 and the Brown University Seed Fund.Lise-Marie Lacroix thanks the French State/D4S grant for supporting her work at Brown University.
文摘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℃.
