Chemically ordered face-centred tetragonal Fe-Pt nanoparticles embedded SiO films.

PRAMANIK, SOURAV; DE, GOUTAM

Chemically ordered face-centred tetragonal (fct) Fe-Pt alloy nanoparticles (NPs) embedded SiO films were synthesized on glass substrate by in situ hybrid sol-gel approach followed by heating at 450-900 °C in air and reducing (10% H-90% Ar) atmospheres. Heat treatment of Fe/Pt co-doped films in air caused generation of Pt NPs first. At this stage, Fe remained in ionic state covalently bonded with silica network. Further heat treatment at 800-900 °C in reducing atmosphere facilitated the formation of uniformly dispersed fct Fe-Pt alloy NPs in amorphous SiO film matrix. The generated alloy composition was estimated by grazing incidence X-ray diffraction and TEM analysis to be FePt which is close to the nominal value.

PLATINUM nanoparticles; SOL-gel processes; NANOCOMPOSITE materials; SILICON oxide films; X-ray diffraction

Bulletin of Materials Science, 2012, Vol 35, Issue 7, p1079

0250-4707

Academic Journal

10.1007/s12034-012-0406-3