Abstract
Fe Cu Pt nanoparticles were prepared by the simultaneous polyol reduction of platinum acetylacetonate and copper acetylacetonate and the thermal decomposition of iron carbonyl. The addition of copper promoted the disorder FCC structure to order structure, thereby reducing the temperature required for this transition about 50-100 . Under 500 annealing temperature and the same annealing condition, the coercivity of the Fe Cu Pt nanoparticles containing 11% copper was 243 Oe while the pure FePt nanoparticles were superparamagnetic. From the x-ray powder diffraction and x-ray absorption spectroscopy results, it was found that FePtCu ternary alloy was formed and the Fe site was replaced by Cu.