Fe 60 Pd 40 nanoparticles were prepared by sonoelectrodeposition. After annealing at various temperatures from 450°C to 700°C, the nanoparticles were found to have an ordered L1 0 structure and to show hard magnetic properties. Among the samples investigated, the nanoparticles annealed at 600°C exhibited the highest coercivity which amounts to 2.31 kOe at 2 K and 1.83 kOe at 300 K.
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