Figure 4
Monochromatic beam (Si 111 double-monochromator) topographs taken on the peak of the rocking curve at different sample-to-detector distances, λ = 0.559 Å, τ2(0 0 0 0) reflection, Czochralski-grown quasicrystal Al69.7Mn22.7Pd7.6, annealed for 96 h at 1023 K, sample-to-detector distance 35 cm (a), 15 cm (b), 1.7 cm (c). h indicates the direction of the diffraction vector. |