Eur. Phys. J. B 7, 513-516 (1999)
https://doi.org/10.1007/s100510050640

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

¹ Institut Laue Langevin, B.P. 156, 38042 Grenoble, France
² Laboratoire de Thermodynamique et Physico-Chimie Métallurgiques (CNRS -UMR 5614) , INPG, UJF, B.P. 75, 38402 Saint Martin d'Hères, France
³ Institute for Materials Research, Tohoku University, Sendai 980-77, Japan
⁴ National Research Institute for Metals, Tsukuba 305, Japan
⁵ Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974, USA
⁶ Institut für Physik, Technische Universität Chemnitz-Zwickau, 09107 Chemnitz, Germany
⁷ Institut für Kristallographie, LMU München, 80333 München, Germany

Received: 18 November 1998
Accepted: 27 November 1998
Published online: 15 February 1999

Abstract

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.