Structure of Weiss domains in ferroelectric crystals
Affiliation:
Dipartimento di Matematica e Applicazioni dell'Università di Napoli, Via Mezzocannone, 88134, Napoli, Italy
Department of Engineering Sciences, Faculty of Science, Istanbul Technical University, Maslak 80626, Istanbul, Turkey
Abstract:
The structure of Weiss domains in ferroelectric crystals in each of which the polarization vector is constant, is investigated through a new variational principle. The general field equations are obtained and it is shown that in the presence of external electric field the total electric field is also constant in Weiss domains but is usually different from that of the polarization field. Moreover, it is proved that domain walls can only be planar surfaces. Finally the case corresponding to pure polarization fields is also treated and an illustrative problem is considered.