Piezoelectric enhancement of(PbTiO3)m/(BaTiO3)nferroelectric superlattices through domai

Abstract

The phase diagram of (PbTiO 3 ) m /(BaTiO 3 ) n ferroelectric superlattices was computed using the phase-field approach as a function of layer volume fraction and biaxial strain to tune ferroelectric properties through domain engineering. Two interesting domain structures are found: one with

Polarization coupling transition inBaTiO3/PbZr0.2Ti0.8Salev1, Mahayni2, Grigoriev3 2016Phys. Rev. B13250View full textAdd to dashboardCite

“…Ferroelectric multilayers and superlattices provide a pathway to engineer novel materials with enhanced functional properties in respect to the properties of single-layer materials [1][2][3][4][5][6].…”

Stability of Polar Vortex Lattice in Ferroelectric Superlattices

“…To address these questions, we employ phase-field modeling in conjunction with a Ginzburg–Landau based analytical model to explore the stability of the vortex structure as a function of superlattice periodicity and STO layer thickness. Over the last two decades, phase-field modeling has been widely employed to study the domain structure and evolution in ferroelectric thin films − and has also been successfully extended to unveil the domain structures, switching kinetics, phase diagrams, and physical properties for a variety of superlattice systems. − In the phase-field approach, the spatially dependent polarization vector P⃗ = ( P x , P y , P z ) is selected as the order parameter to describe the polar states. The evolution of this polarization is governed by the time-dependent Ginzburg–Landau (TDGL) equations and driven by the minimization of the total energy, which is comprised of chemical, elastic, electric, and polarization gradient energies .…”