Phase-field modeling and electronic structural analysis of flexoelectric effect at 180° domain walls in ferroelectric PbTiO3

Atomic structure of steps on 180° ferroelectric domain walls in PbTiO3

Using the method of anharmonic lattice statics, we calculate the equilibrium structure of steps on 180° ferroelectric domain walls DWs in PbTiO3. We consider three different types of steps: i Ti–Ti step that joins a Ti-centered DW to a Ti-centered DW, ii Pb–Pb step that joins a Pb-centered DW to a Pb-centered DW, and iii Pb–Ti step that joins a Pb-centered DW to a Ti-centered DW. We show that a...

Atomic-scale mapping of dipole frustration at 90° charged domain walls in ferroelectric PbTiO3 films

The atomic-scale structural and electric parameters of the 90° domain-walls in tetragonal ferroelectrics are of technological importance for exploring the ferroelectric switching behaviors and various domain-wall-related novel functions. We have grown epitaxial PbTiO3/SrTiO3 multilayer films in which the electric dipoles at 90° domain-walls of ferroelectric PbTiO3 are characterized by means of ...

Long-range strains and the effects of applied field at 180 degrees ferroelectric domain walls in lithium niobate

Anomalous domain periodicity observed in ferroelectric PbTiO3 nanodots having 180° stripe domains

Nanometer-scale ferroelectric dots and tubes have received a great deal of attention owing to their potential applications to nonvolatile memories and multi-functional devices. As for the size effect of 180° stripe domains in ferroelectric thin films, there have been numerous reports on the thickness-dependent domain periodicity. All these studies have revealed that the domain periodicity (w) o...

Ferroelectricity driven magnetism at domain walls in LaAlO3/PbTiO3 superlattices

Charge dipole moment and spin moment rarely coexist in single-phase bulk materials except in some multiferroics. Despite the progress in the past decade, for most multiferroics their magnetoelectric performance remains poor due to the intrinsic exclusion between charge dipole and spin moment. As an alternative approach, the oxide heterostructures may evade the intrinsic limits in bulk materials...