Impact of free charges on polarization and pyroelectricity in antiferrodistortive structures and surfaces induced by a flexoelectric effect

A. N. Morozovska, E. A. Eliseev, M. D. Glinchuk, Long Qing Chen, S. V. Kalinin, V. Gopalan

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Abstract

Landau-Ginzburg-Devonshire theory has been used to show that the combined effect of flexoelectricity and rotostriction can lead to a spontaneous polarization and pyroelectricity in the vicinity of antiphase boundaries, structural twin walls, surfaces, and interfaces in the octahedrally tilted phase of otherwise non-ferroelectric SrTiO3. In particular, the spontaneous polarization reaches the values ∼0.1-5μC/cm2 at the SrTiO3 antiphase boundaries and twins without free charges. In the current study we consider the contribution of free charges and show that the spontaneous polarization reaches the values ∼1-5μC/cm2 in the case. Pyroelectric coefficients also strongly increase allowing for the free charges.

Original languageEnglish (US)
Pages (from-to)32-44
Number of pages13
JournalFerroelectrics
Volume438
Issue number1
DOIs
Publication statusPublished - Dec 1 2012
Event11th International Symposium on Ferroic Domains and Micro- to Nanoscopic Structures, ISFD 2012, and 11th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity, RCBJSF 2012 - Ekaterinburg, Russian Federation
Duration: Aug 20 2012Aug 24 2012

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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