Atomic dynamics of an Al0.62Cu0.255Fe0.125 icosahedral quasicrystal

The atomic dynamics of an Al0.62Cu0.255Fe0.125 icosahedral quasicrystal is investigated using inelastic neutron scattering (the isotopic contrast method). The partial vibrational spectra of copper, iron, and aluminum atoms in the icosahedral quasicrystal and the total spectrum of thermal vibrations...

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Bibliographic Details
Published in:Physics of the solid state 2004-03, Vol.46 (3), p.526-531
Main Authors: Parshin, P. P., Zemlyanov, M. G., Mashkov, A. V., Brand, R. A., Dianoux, A. -J., Calvayrac, Y.
Format: Article
Language:English
Subjects:
Aluminum
Copper
Inelastic scattering
Iron
Neutron scattering
Neutrons
Quasicrystals
Vibrational spectra
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Summary:The atomic dynamics of an Al0.62Cu0.255Fe0.125 icosahedral quasicrystal is investigated using inelastic neutron scattering (the isotopic contrast method). The partial vibrational spectra of copper, iron, and aluminum atoms in the icosahedral quasicrystal and the total spectrum of thermal vibrations of the compound are directly reconstructed from the experimental data for the first time. It is found that the vibrational energies of copper and iron atoms fall in relatively narrow ranges near 16 and 30 meV, respectively, whereas the vibrational energies of aluminum atoms lie in a wide range (up to 60 meV).
ISSN:1063-7834
1090-6460
DOI:10.1134/1.1687873