Effects of annealing time on structural and magnetic properties of L10-FePt nanoparticles synthesized by the SiO2-nanoreactor method

摘要

We investigated effects of annealing time on structural and magneticproperties of the L10-FePt nanoparticles synthesized by the SiO2-nanoreactermethod. The magnetization and powder X-ray diffraction studies revealed thatthe annealing at 900 oC for 9 hr could convert all of the fcc-nanoparticles tothe well-crystallized L10 structure with a large coercivity while keeping theirparticle size. Such monodisperse and highly crystalline L10-FePt nanoparticlesare a promising material for the realization of ultra-high density recording.