Magnetic properties and microstructure of fine Fe–Pt nanoparticles prepared by chemical reduction

Abstract The structural and magnetic properties of Fe–Pt nanoparticles with Fe 2+ /Pt 4+ molar ratio of 1, 1.25, 1.5, 2 were studied in the as-prepared and annealed samples. The powders were produced by chemical reduction. The magnetization and coercivity of as-made particles were relatively low. After annealing, M S increases and H C decreases with increasing Fe 2+ /Pt 4+ molar ratio. The maximum values of M S and H C obtained were about 75 emu/g and 20 kOe, respectively.