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Stability of a ferroelectric phase with electrical domains in multilayers

By Burç Mısırlıoğlu and Burc Misirlioglu

Abstract

Multilayer BaTiO3-SrTiO3 and PbTiO3-SrTiO3 structures with different electrical domain states are studied using a Landau-Ginzburg-Devonshire free energy. Polarizations in the layers are computed for multidomain and single-domain states where the paraelectric-to-ferroelectric volumetric layer ratio is varied. It is shown that the ferroelectric layers with electrical domains are thermodynamically more stable than the single-domain ferroelectric state. High domain wall energies result in the stabilization of the paraelectric state in the ferroelectric layers for large depolarizing fields. It is concluded that the stability of single-domain state ferroelectric layers correspond to a very small paraelectric-to-ferroelectric ratio after which multidomain ferroelectric state is favored

Topics: QC501-766 Electricity and magnetism, QC310.15 Thermodynamics, QC Physics, QC176-176.9 Solids. Solid state physics
Publisher: 'AIP Publishing'
Year: 2009
DOI identifier: 10.1063/1.3129872
OAI identifier: oai:research.sabanciuniv.edu:13675

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