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(Color online) Schematic illustration of synthesis of the -FePt nanocrystals dispersed in solvents via the -nanoreactor strategy.
TEM images of the -coated FePt nanoparticles (a) before annealing, (b) after annealing at , and (c) after the removal of the shell. Inset shows an image of the solution containing the -FePt nanocrystals.
XRD patterns of the -coated FePt nanoparticles (a) before annealing and annealed at various temperatures of (b) , (c) , and (d) , and (e) after the removal of the shell.
(a) Room-temperature hysteresis loop of the sample annealed at . Inset shows plots of at as a function of annealing temperature. The solid line is a guide for the eyes. (b) Hysteresis loop of the solvent-dispersed -FePt nanocrystals (annealed at ) measured at after cooling in an applied magnetic field of .
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