Dynamical properties of epitaxial ferroelectric superlattices

Magnetoelectric effect in thin films and layered toroidal structures

“…͑1͒ we have omitted the interaction between layers, since the giant values of the susceptibility in Ref. 6 were observed in the case of a weak interlayer interaction ͑see also Refs. 7 and 8͒.…”

“…Giant values of the dielectric susceptibility have been observed recently in layered structures with thin ferroelectric layers having a weak interlayer interaction in the neighborhood of the so-called thickness-induced ferroelectric phase transition. 6 It is of interest to study the magnetoelectric effect in films and in systems containing thin toroidal layers in the vicinity of the thickness-induced toroidal phase transition. This is done below for the case of the toroic nickel iodine boracite.…”

Origin of giant dielectric response in ferroelectric thin film multilayers

“…The dielectric susceptibility was recently measured [2] in superlattices consisting of ferroelectric PbTi03 (PT) and paraelectric Pbl.,La,TiO3 (x=0.28 -PLT) grown on (100)-oriented SrTiO3 single crystal substrates. The paraelectric phase of a PLT film can be the reason of zero polarization on the films surfaces.…”

“…There is also a basic interest to study fundamental questions related to ferroelectricity on increasingly smaller length scales. Recent experiments have revealed many unusual properties such as giant response [2], anomalies in the ferroelectric-paraelectric phase transition temperature [3] and in superlattice structural anomalies [4]. There have been few theoretical studies of ferroelectric multilayer structures up to now.…”

A Theoretical Model on Size Effect of Dielectric Response in DC Bias Field in Barium Titanate Ceramic System

“…In this work, attention is paid to the dielectric response in DC bias field in the hope of deriving a model of size effect about this theoretically. The dielectric response is divided into two parts 13,14 . In the first part, the motion of domain walls should be clamped near grain boundaries 15 ; in the second part, the dielectric response of a pure ferroelectric body is affected by DC bias field with the LGD theory 16 .…”