The peculiarities of the Bleustein-Gulyaev wave propagation in structures containing conductive layer.

Abstract:

:As known, anomalous resisto-acoustic effect is a fundamental property for weakly inhomogeneous piezoactive waves (Bleustein-Gulyaev, Love, and some leaky waves). It consists in that the velocity of aforementioned waves first increases, achieves its maximum, and only then decreases with increasing conductance of a layer placed at the surface of piezoelectric half-space. In this paper we continue to study the peculiarities of the effect appearance and the influence of different electrical boundary conditions on its characteristics. Conditions have been found under which the said effect appears and, respectively, disappears. The magnitude of positive change in velocity with increasing layer conductance is demonstrated to be reduced up to zero as a layer with arbitrary conductance has been moved away from the piezoelectric surface. The positive change in velocity increases when an perfectly conductive screen moves away from the "piezoelectric half-space - conductive layer" structure. The obtained results are useful for a more deep understanding the physical basis of propagation of weakly inhomogeneous piezoactive acoustic waves (Bleustein-Gulyaev, Love, and some leaky waves).

journal_name

Ultrasonics

journal_title

Ultrasonics

authors

Kuznetsova IЕ,Zaitsev BD

doi

10.1016/j.ultras.2015.01.007

subject

Has Abstract

pub_date

2015-05-01 00:00:00

pages

45-9

eissn

0041-624X

issn

1874-9968

pii

S0041-624X(15)00009-8

journal_volume

59

pub_type

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