3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-693-C5-696
Propagation d'ondes acoustiques dans des empilements faiblement désordonnésC. CONSTANTOPOULOS and B. PERRIN
Département de Recherches Physiques, Université P & M Curie, T22, Boîte 136, 4 place Jussieu, 75252 Paris cedex 05, France
This work is devoted to a numerical study of transverse waves localization propagating along the stacking axis of random alternating Fe-Cu layers. The randomness is introduced through fluctuations of the layer thickness. For a weak disorder, the calculated localization length is in good agreement with the theoretical (asymptotic) predictions as far as a large number of plies (5000) is considered. For a more realistic number of plies, from an experimental point of view (200<N<500), large discrepancies appear due to the weak acoustic contrast at the interface Cu-Fe.
© EDP Sciences 1994