Synthesis of Sm–Co and Sm–Co/Fe nanocrystals by reductive annealing of nanoparticles
نویسندگان
چکیده
We report here a simple route for the chemical synthesis of SmCo5 and Sm2Co17 single-phase and SmCo5/Fe composite nanocrystals by polyol reduction of metal precursors and subsequent calcium reductive annealing. Sm2O3 and Co nanoparticles were synthesized first, and nanocrystalline SmCo5 or Sm2Co17, compound with tunable composition was then obtained after the annealing. The composition of the compound was controlled by varying the initial molar ratio of the metal precursors. At room temperature, the obtained SmCo5 and Sm2Co17 show coercivity of 12kOe and 4kOe, and saturationmagnetization of 70emu/g and 85emu/g, respectively. To prepare SmCo5/Fe nanocomposites, Fe, Co and Sm2O3 nanoparticles were synthesized in one-pot by polyol reduction of the metal precursors. © 2010 Published by Elsevier B.V.
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