Direct synthesis of fct-structured FePt nanoparticles at low temperature with assistance of poly(N-vinyl-2-pyrrolidone).
Direct synthesis of fct-structured FePt nanoparticles was successfully achieved by using poly(N-vinyl-2-pyrrolidone) as a protective reagent at lower temperature than the case using low molecular weight ligands as a protective reagent. Experimental data suggest that a transformation of FePt nanoparticles from face-centered cubic to face-centered tetragonal (fct) structure takes place at reaction temperature of 261 degrees C. The results of XRD and the magnetic properties exhibit that the FePt nanoparticles synthesized at 261 degrees C have partially ordered fct-structure and a ferromagnetic behavior at room temperature.
Iwamoto
Takashi
T
Department of Innovative and Engineered Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8502, Japan. iwamoto.t.ab@m.titech.ac.jp
Matsumoto
Kinya
K
Kitamoto
Yoshitaka
Y
Toshima
Naoki
N