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X-ray diffraction symmetric scans taken with a slit in front of the detector for samples A-0 and A-3. The inset shows the region covering GaN (0002) and SiC (0006) reflections in an expanded scale.
Magnetization loops obtained for samples A-0, A-1, and A-3 at (a) and (b) . The insets show the loops corrected for the diamagnetic background.
Temperature dependence of magnetization at field-cooled (solid symbols) and zero-field-cooled (open symbols) conditions at a magnetic field of for samples A-1 and A-3.
Magnetic moment per Gd atom as a function of Gd concentration at (solid squares) and (open squares). Insets show the magnetization obtained at as a function of Gd concentration at (upper-right corner) and (lower-left corner). Straight lines are guides to the eyes.
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