Experimental x-ray reflectivity data from the virgin (circle) and the ion-irradiated (square) with a dose of multilayer samples. Data for the irradiated sample are vertically shifted down by three orders of magnitude for clarity. The first-order Bragg peaks are shown in the linear scale in the inset.
A cross-sectional TEM image of the virgin multilayer. Fourier transform of the marked square region is shown in the inset (a). Diffraction pattern due to the periodic multilayer stack is shown in the inset (b).
A selected area transmission electron diffraction pattern from the multilayer. The indexed spots are from polycrystalline Pt.
A HRTEM image from the virgin multilayer.
A cross-sectional TEM image of the irradiated multilayer. Fourier transform of the marked square region of the TEM image is shown in the inset (a). Inverse Fourier transform of inset (a) is shown in the inset (b).
A HRTEM image from the irradiated sample. The region with the planar spacing of is likely to be an FePt region.
GIXRD pattern from the irradiated sample measured with x rays. The positions of the diffraction lines are indicated: Pt (1), FePt (2), and bcc Fe (3). Peak positions agree with the presence of FePt particles.
The values of , , , and for calculating .
Values of heat of mixing, cohesive energy, and the factor determining the sign of the effective diffusion coefficient for the Pt–C, Pt–Fe, and Fe–C systems.
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