Anisotropic nonlinear elastic properties of an icosahedral quasicrystal
We show that the nonlinear behavior of transverse acoustic waves can reveal the anisotropic structure of an icosahedral quasicrystal, at the macroscopic level. We report experiments performed in i-Al-Pd-Mn. We observe that a primary transverse acoustic wave can generate a second harmonic transverse acoustic wave. We also observe a specific relation between the polarization directions of those waves. These observations are manifestations on a macroscopic scale of the long-range order in quasicrystals.
Duquesne
J
LMDH, Universite Pierre et Marie Curie/CNRS (UMR 7603), Boite 86, 4, place Jussieu, 75252 Paris Cedex 05, France.
Perrin
B