Minimum tetragonality in PbTiO3/BaTiO3 ferroelectric superlattices

Liang Hong; Yulan Li; Pingping Wu; Long Qing Chen

doi:10.1063/1.4824922

Minimum tetragonality in PbTiO₃/BaTiO₃ ferroelectric superlattices

Liang Hong, Yulan Li, Pingping Wu, Long Qing Chen

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4 Scopus citations

Abstract

PbTiO₃/BaTiO₃ ferroelectric superlattices commensurately constrained by a SrTiO₃ substrate are studied using both phenomenological theory and phase field simulations. It is found that the spontaneous polarization of the superlattice does not vary significantly with volume fraction until PbTiO₃ becomes the majority of the superlattice. A minimum tetragonality exists at room temperature when the PbTiO₃ volume fraction is around 90%, resulted from its different sensitivity to epitaxial strains and the electrostatic coupling of the two polarized layers in this PbTiO₃/BaTiO₃ superlattice.

Original language	English (US)
Article number	144103
Journal	Journal of Applied Physics
Volume	114
Issue number	14
DOIs	https://doi.org/10.1063/1.4824922
State	Published - Oct 14 2013

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1063/1.4824922

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title = "Minimum tetragonality in PbTiO3/BaTiO3 ferroelectric superlattices",

abstract = "PbTiO3/BaTiO3 ferroelectric superlattices commensurately constrained by a SrTiO3 substrate are studied using both phenomenological theory and phase field simulations. It is found that the spontaneous polarization of the superlattice does not vary significantly with volume fraction until PbTiO3 becomes the majority of the superlattice. A minimum tetragonality exists at room temperature when the PbTiO3 volume fraction is around 90%, resulted from its different sensitivity to epitaxial strains and the electrostatic coupling of the two polarized layers in this PbTiO3/BaTiO3 superlattice.",

author = "Liang Hong and Yulan Li and Pingping Wu and Chen, {Long Qing}",

note = "Funding Information: This work was supported by the NSF through grants DMR-0820404, DMR-1210588, and DMR-1006541. The computer simulations were carried out on the LION and cyberstar clusters at the Pennsylvania State University, in part supported by instrumentation (cyberstar Linux cluster) funded by the NSF through Grant OCI-0821527.",

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doi = "10.1063/1.4824922",

language = "English (US)",

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T1 - Minimum tetragonality in PbTiO3/BaTiO3 ferroelectric superlattices

AU - Hong, Liang

AU - Li, Yulan

AU - Wu, Pingping

AU - Chen, Long Qing

N1 - Funding Information: This work was supported by the NSF through grants DMR-0820404, DMR-1210588, and DMR-1006541. The computer simulations were carried out on the LION and cyberstar clusters at the Pennsylvania State University, in part supported by instrumentation (cyberstar Linux cluster) funded by the NSF through Grant OCI-0821527.

PY - 2013/10/14

Y1 - 2013/10/14

N2 - PbTiO3/BaTiO3 ferroelectric superlattices commensurately constrained by a SrTiO3 substrate are studied using both phenomenological theory and phase field simulations. It is found that the spontaneous polarization of the superlattice does not vary significantly with volume fraction until PbTiO3 becomes the majority of the superlattice. A minimum tetragonality exists at room temperature when the PbTiO3 volume fraction is around 90%, resulted from its different sensitivity to epitaxial strains and the electrostatic coupling of the two polarized layers in this PbTiO3/BaTiO3 superlattice.

AB - PbTiO3/BaTiO3 ferroelectric superlattices commensurately constrained by a SrTiO3 substrate are studied using both phenomenological theory and phase field simulations. It is found that the spontaneous polarization of the superlattice does not vary significantly with volume fraction until PbTiO3 becomes the majority of the superlattice. A minimum tetragonality exists at room temperature when the PbTiO3 volume fraction is around 90%, resulted from its different sensitivity to epitaxial strains and the electrostatic coupling of the two polarized layers in this PbTiO3/BaTiO3 superlattice.

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ER -

Minimum tetragonality in PbTiO₃/BaTiO₃ ferroelectric superlattices

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