Effect of domain structure on physical properties of ferroelectrics

Abstract
The elastic compliance coefficients, dielectric permittivities and piezoelectric constants of a BaTiO3 tetragonal crystal with periodically alternating layers of 180° domains were calculated. It was shown that the presence of 180° domain walls resulted in changes of a number of elastic and dielectric constants of the polydomain sample as compared with the single domain one. The propagation of elastic waves in the laminated crystal was considered. The frequency dependence of effective permittivity and the effect of domain structure on the piezoelectric behaviour of crystal were analysed.

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