TEM images of the as-synthesized (a) 7 nm FePt nanoparticles, (b) 7 nm FePt nanoparticles coated with 1 nm, and (c) 7 nm FePt nanoparticles coated with 3 nm shell (scale bar is 20 nm).
TEM images of as-synthesized (a) 4 nm/2 nm, (b) 6 nm/1 nm, (c) 8 nm/2 nm, and (d) 8 nm/3 nm core/shell nanoparticles (scale bar is 20 nm).
XRD of the as-synthesized core/shell nanoparticles with FePt(#) core diameter (a) 4 nm, (b) 5 nm, (c) 6 nm, (d) 7 nm, (e) 8 nm with 1 nm shell thickness and (f) nanocomposite after annealing of 8 nm FePt/1 nm after annealing at for 1 h.
TEM images of the as-synthesized heterodimer nanoparticle with 8 nm FePt attached with (a) 5 nm, (b) 8 nm, and (c) 10 nm (scale bar is 20 nm).
(a) Room-temperature hysteresis loops of annealed (a) core/shell nanoparticles with 8 nm FePt core and shell thickness increasing from 1 to 3 nm. (b) Heterodimer nanoparticles with 8 nm FePt and from 5 to 10 nm at for 1 h.
Variation in maximum energy product of the annealed (a) core/shell nanoparticles of different FePt core sizes (4–8 nm) and shell thickness (0–3 nm) and (b) heterodimer nanoparticles of different sizes FePt (6–8 nm) and (0–10 nm).
curves of 8 nm/2 nm core/shell and 8 nm/8 nm heterodimer nanoparticles after annealing at for 1 h.
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