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Abstract
The problem of domain wall motion near a ferroelectric/dielectric interface is studied using the Landau-Ginzburg-Devonshire three-dimensional phenomenological approach. To account for the effect of the “dead layer”, the generalized boundary conditions are introduced. The small value of the dielectric permittivity in comparison with the ferroelectric one allows us to consider both half-spaces independently. The dependence of 180o domain wall velocity on the applied electric field is investigated. It is assumed that characteristic time and length of the varying external field are significantly greater than the ferroelectric relaxation time and length, respectively. In our investigations the axially symmetric ferroelectric is considered.
Acknowledgments
The authors are grateful to A. K. Tagantsev for numerous useful discussions during the course of the work.