Phason strain in a mechanically polished Al Pd Mn icosahedral single quasicrystal

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Abstract
Two icosahedral Al Pd Mn samples extracted from the same Czochralskigrown single quasicrystal have been studied by high-resolution synchrotron X-ray diffraction. While the first sample had an almost planar surface resulting from cleavage, the second had a planar surface obtained by mechanical polishing. In Q both samples the width of the diffraction peak profiles increases linearly with, per the perpendicular component of the six-dimensional reciprocal lattice vector. However, the broadening is larger in the polished sample, indicating that phason strain has been introduced during the polishing process.

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