(a) TEM (bright field) and (b) HRTEM images of as prepared nanocomposites.
TEM bright-field image of an as prepared nanocomposite.
(Color online) Hysteresis loops of heat-treated FePt nanoparticles and and nanocomposites: (a) at for and (b) at for .
(Color online) plots of heat-treated FePt nanoparticles and and nanocomposites: (a) at for and (b) at for .
TEM bright-field images of heat-treated (a) nanocomposite, (b) FePt nanoparticles, and (c) nanocomposite.
(Color online) XRD patterns of heat-treated nanocomposites compared to those of FePt nanoparticles. The peaks are indexed to the tetragonal structure or the cubic MgO structure where indicated. The numbers on the left indicate FePt:MgO molar ratios used during the preparation, thus 1:0 denotes stand-alone FePt nanoparticles. The inset shows an enlarged graph of the (111) peak profile of the heat-treated stand-alone FePt and its analysis to two components corresponding to different Scherrer sizes.
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