Effects of annealing time on structural and magnetic properties of   L10-FePt nanoparticles synthesized by the SiO2-nanoreactor method
  We investigated effects of annealing time on structural and magnetic properties of the L10-FePt nanoparticles synthesized by the SiO2-nanoreacter method. The magnetization and powder X-ray diffraction studies revealed that the annealing at 900 oC for 9 hr could convert all of the fcc-nanoparticles to the well-crystallized L10 structure with a large coercivity while keeping their particle size. Such monodisperse and highly crystalline L10-FePt nanoparticles are a promising material for the realization of ultra-high density recording. 
Y. Tamada, Y. Morimoto, S. Yamamoto, M. Takano, S. Nasu and T. Ono