FePtCu nanoparticles with various compositions were synthesized by the simultaneous polyol reduction of Pt(acac)2 and Cu(acac)2 and the thermal decomposition of Fe(CO)5. A transformation from fee structure of the as-made samples to fct structure was observed in some samples after annealing at 400°C for 1 hour. The maximum value of stability factor, KuV, of 1.14 × 10-12 erg (Ku: uniaxial anisotropy energy, V: switching volume) was estimated in Fe36Pt 42Cu22 nanoparticles with an average radius of 5.5 nm. This value is comparable to that of the Fe5Pt45 nanoparticles annealed at 550°C for 30 minute. We evaluated the value of Ku of 1.3 × 107 erg/cm3 using the average volume of the nanoparticles.
ASJC Scopus subject areas
- Condensed Matter Physics