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Attenuation measurements of an ultrasonic Rayleigh wave propagating along rough surfaces

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3 Author(s)
de Billy, M. ; Groupe de Physique des Solides, Université Paris 7, Tour 23, 2, place Jussieu 75251, Paris Cedex 05, France ; Quentin, G. ; Baron, E.

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The attenuation of Rayleigh surface waves by one‐ and two‐dimensional rough surfaces is investigated on duraluminum and titanium samples. The root‐mean‐square deviation of the surface from flatness h (8.5≪h≪90 μm) satisfies the condition of validity of the perturbation theory approach ϵ=h/λR≪1. The excitation frequencies of the transmitter vary from 2.2. to 10 MHz. Experimental results for one‐ and two‐dimensional rough surfaces are presented and discussed. A comparison with the theoretical calculations of Eguiluz and Maradudin [Phys. Rev. B 28, 728 (1983)] confirms the F5 dependence of the attenuation α as aq→0.

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Journal of Applied Physics  (Volume:61 ,  Issue: 6 )