Synthesis and Characterization of L10 FePt Nanoparticles from Pt(Au, Ag)/γ-Fe2O3 Core–Shell Nanoparticles


  • E. C. Growth Program HIDEMAR supported this work.


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L10 FePt nanoparticles have been prepared from Pt(Ag)/γ-Fe2O3 and Pt(Au)/γ-Fe2O3 core/shell nanoparticles (see Figure). Addition of Ag reduces the fcc-to-L10 transformation temperature by 100–150 °C, while addition of Au causes a reduction of more than 150 °C compared with pure FePt nanoparticles. Annealing at 400 °C reveals a coercivity of 2.9 kOe for the Ag and 6 kOe for the Au-doped FePt nanoparticles.