We consider the influence of the built-in surface field on the 180-degree domain wall profile in primary ferroics within Landau-Ginsburg-Devonshire phenomenological approach. We predict the effect of domain wall bending near the surface caused by the built-in field and derived corresponding approximate analytical expressions. At that the higher is the surface energy contribution (i.e. the smaller is corresponding extrapolation length) and/or the higher is the field, the stronger is the bending effect. Built-in surface field is one of the possible mechanisms of domain wall near surface broadening recently observed in the ferroics.
Cite
@article{arxiv.0808.1255,
title = {Built-in surface field effect on the 180-degree domain wall structure in ferroics},
author = {Eugene A. Eliseev},
journal= {arXiv preprint arXiv:0808.1255},
year = {2008}
}