XRD patterns of FePt nanoparticles of (a) as-synthesized, (b) annealed at for by RTA, and (c) annealed at for by FA. The average grain sizes are (a) , (b) , and (c) , respectively.
The grain size as a function of annealing time at for RTA and FA treated samples.
TEM images of FePt nanoparticles: (a) as-synthesized particles, (b) RTA treated at for , (c) RTA treated at for , (d) furnace annealed at for , and (d) furnace annealed at for .
The annealing time dependence of chemical ordering parameter and coercivity for RTA performed at .
Demagnetization curves of FePt particles annealed at for different times.
The relationship between the coercivity and annealing time at different temperatures with (a) the linear time scale and (b) the square root of time scale.
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