Anomalous behaviour of leaky surface waves for stiffening layer near cutoff | Zendy

Pavel Zinin | Zendy; O. Lefeuvre | Zendy; G. A. D. Briggs | Zendy; B. D. Zeller | Zendy; P. Cawley | Zendy; A. J. Kinloch | Zendy; G.E. Thompson | Zendy

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Anomalous behaviour of leaky surface waves for stiffening layer near cutoff

Author(s) -

Pavel Zinin,

O. Lefeuvre,

G. A. D. Briggs,

B. D. Zeller,

P. Cawley,

A. J. Kinloch,

G.E. Thompson

Publication year - 1997

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.365867

Subject(s) - attenuation , isotropy , materials science , layer (electronics) , cutoff , cutoff frequency , substrate (aquarium) , optics , surface wave , composite material , condensed matter physics , physics , geology , oceanography , quantum mechanics

The propagation of surface acoustic waves has been investigated for a layered system (water-isotropic layer-isotropic substrate) where the layer is faster than the substrate. It has been found that when the velocity of the surface wave reaches the velocity of the shear wave of the substrate (cutoff) the behaviour of the attenuation has an anomalous character. Attenuation drops down towards zero below cutoff and increases abruptly beyond cutoff. Acoustic microscopy measurements on aluminum coated with oxalic oxide film were in coincidence with theory.

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