Magnetic properties of FePt nanoparticles annealed with NaCl

A simple method to obtain fct FePt nanoparticles has been developed recently by Elkins et al. The fee particles were then mixed with fine ground salt (NaCl) powders and annealed. The fine ground salt acts to separate the particles during the annealing process, and thus prevents sintering whilst allowing the phase change. The salt can then be washed out of the mixture with water to leave only monodisperse fct FePt nanoparticles.