Low-T ferroelectricity in antiphase domain boundaries of SrTiO3

L. Arzel*, B. Hehlen, A. K. Tagantsev, F. Dénoyer, K. D. Liss, R. Currat, E. Courtens

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The ferroelectric transition of bulk strontium titanate is suppressed by a combination of two effects: (1) the structural changes produced by the antiferrodistortive transition at T a =105 K and (2) the quantum fluctuations. The structural changes are strongly perturbed within antiphase domain boundaries , and this in such a manner that a ferroelectric transition should occur in boundaries containing the tetragonal c -axis at T c ~ 35 to 40 K. This provides a possible explanation for a number of anomalies observed in SrTiO 3 at those temperatures. We report a new low- T anomaly on the lattice parameter c measured on a thin polished platelet. The above model is consistent with its sign and size, as well as with the sign and size of earlier birefringence measurements on similar samples.

Original languageEnglish
Pages (from-to)317-322
Number of pages6
JournalFerroelectrics
Volume267
DOIs
StatePublished - 1 Jan 2002
Externally publishedYes

Keywords

  • Birefringence
  • Domain boundaries
  • Ferroelectric transition
  • Lattice constant
  • Strontium titanate

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