Piezoelectric enhancement of (PbTiO3)m/(BaTiO3)n ferroelectric superlattices through domain engineering

Liang Hong, Pingping Wu, Yulan Li, Venkatraman Gopalan, Chang Beom Eom, Darrell G. Schlom, Long Qing Chen

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

The phase diagram of (PbTiO3)m/(BaTiO3)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 mixed Bloch-Néel-Ising domain wall structures and the other with stabilized monoclinic Mc phases. The polarization of the monoclinic Mc phase is able to rotate from out-of-plane to in-plane or vice versa under an electric field, and thus facilitates the domain reversal of rhombohedral domains. This contributes significantly to both reduced coercive fields and enhanced piezoelectric responses.

Original languageEnglish (US)
Article number174111
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume90
Issue number17
DOIs
StatePublished - Nov 20 2014

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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