A trapped wave in a ferroelectric with a moving strip domain

The existence of a shear homogeneous plane wave trapped by a strip domain m oving uniformly in a tetragonal ferroelectric crystal is demonstrated. Usin g the nonrelativistic quasi-static approximation and a change to the moving frame of reference, the solution is obtained and the dispersion relation i s derived for the spatial spectrum of the trapped wave. The uniqueness of t he solution is established in the case of the multiple degeneracy of the ro ots of the characteristic equation when the trapped wave contains an attach ed wave in the strip domain. The trapped wave is shown to correspond to the antisymmetric mode of the electroacoustic wave of the strip domain at the initial point of the spectrum branch. The specific features of the spatial resonance of the trapped wave with a shear wave obliquely incident on the s trip domain are considered. (C) 2001 MAIK "Nauka/Interperiodica".