We report on acoustic surface waves in quasicrystal Al70.4Mn8.4Pd21.2
studied using Brillouin spectroscopy. Our data are fitted with a spect
ral density modelization and our results are compared to those obtaine
d from previous inelastic neutron scattering and ultrasonic propagatio
n measurements on the bulk samples Al68.7Mn9.6Pd21.7. (C) 1998 Elsevie
r Science Ltd. All rights reserved.