Strain effects on domain structures in ferroelectric thin films from phase-field simulations

Fang Yin Lin, Xiaoxing Cheng, Long Qing Chen, Susan B. Sinnott

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Strain and applied external electric fields are known to influence domain evolution and associated ferroelectric responses in ferroelectric thin films. Here, phase-field simulations are used to predict equilibrium domain structures and polarization-field (P-E) hysteresis loops of lead zirconate titanate (PZT) thin films under a series of mismatch strains, ranging from strongly tensile to strongly compressive. In particular, the evolution of domains and the P-E curves under different applied strains reveal the mesoscale mechanism, the appearance of in-plane polarization during domain switching, that is responsible for a relatively small coercive field and remnant polarization. A Landau energy distribution is analyzed to better understand the domain evolution under various strain conditions. The results provide guidance for choice of mismatched strains to yield the desired P-E hysteresis loops and the domain structures.

Original languageEnglish (US)
Pages (from-to)4783-4790
Number of pages8
JournalJournal of the American Ceramic Society
Volume101
Issue number10
DOIs
StatePublished - Oct 2018

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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