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Inelastic neutron scattering study of the dynamics of the AlNiCo decagonal phase

European Physical Journal B 7(4): 513-516

Autoren/Herausgeber: Dugain F
de Boissieu M
Shibata K
Currat R
Sato TJ
Kortan AR
Suck JB
Hradil K
Frey F
Tsai AP
Erschienen: 1999

The dynamics of the decagonal AlNiCo phase has been investigated on a single-grain quasicrystalline sample using inelastic neutron scattering. The decagonal structure can be viewed as a periodic stacking of quasiperiodic planes. The anisotropy between the modes propagating in the periodic and quasiperiodic directions is found to be much weaker than theoretically predicted. A strong resonance splitting is observed at an energy transfer of 15 meV for transverse modes polarized in the quasiperiodic plane.