Surface Brillouin scattering has been used to measure the dispersion relations of surface, interface, and guided modes in nickel films supported on quartz glass with thicknesses of 100, 200, 500, 1000, and 2000 nm. The elastic constants of nickel have been estimated near the glass interface and near the free surface of the film. Thin films (up to 500 nm) turn out to be homogeneous, while thicker films show increasingly higher values of the elastic constant c44. This behavior could be related to a change from the (111) preferentially oriented nickel crystallites on the glass, typical of thin FCC films, to a more isotropic growth for thicknesses greater than about 500 nm.

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R6sum6-Nous donnons un a p e r p des mesures de la diffusion Brillouin prss d'une interface liquide-solide pour differents rapports des impgdances acoustiques des milieux. Nous avons examin6 116thanol, le polycarbonate et les metaux liquides mercure et gallium en contact avec un support de verre solide. Nous prgsentons quelques mesures am6lior6es sur les modes de Lamb et de Love dans les couches minces de polycarbonate sur un support de verre Pyrex. Nous analysons de f a~o n d6taillge une onde du type Stoneley 2 l'interface m6tal liquide-verre. Notre interf6rom5tre am6lior6 du type Fabry-P6rot B double passage est d6crit brisvement.