This paper reports an improved synthesis of hard magnetic fct-FePt nanoparticles (NPs) from reductive annealing of fcc-FePt/Fe3O 4/MgO NPs followed by MgO removal. The fcc-FePt/Fe3O 4 NPs are made by a one-pot reaction of Pt(acac)2 with Fe(CO)5 in the presence of oleic acid and oleylamine and are coated with a layer of MgO via the thermal decomposition of Mg(acac)2. The MgO coating prevents FePt from sintering under high temperature reductive annealing conditions. The fct-FePt NPs obtained from the 650°C annealing of the fcc-FePt/Fe3O4/MgO NPs show a coercivity value of 2 T at 300 K, suitable for various nanomagnetic applications.
|Original language||English (US)|
|Number of pages||4|
|Journal||Chemistry of Materials|
|State||Published - Dec 9 2008|
ASJC Scopus subject areas
- Chemical Engineering(all)
- Materials Chemistry