A novel mechanism to reduce coercive field of ferroelectric materials via {1 1 1} twin engineering

Shi Gu Cao, Hong Hui Wu, Hang Ren, Long-qing Chen, Jie Wang, Jiangyu Li, Tong Yi Zhang

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

In the present work, we proposed a new strategy to increase the domain variants within the entire body of ferroelectrics, based on crystal twin engineering that increases the number of ferroelectric variants within each twinned grain, and demonstrated this strategy with polycrystalline barium titanate films. A novel thermomechanical treatment technique was developed to introduce {1 1 1} nanotwins into the films with different twin densities. The experimental results show that the coercive field is 32% lower in the high twin density samples than that in the low twin density ones. The conducted phase field simulations qualitatively confirmed the experimental results. Furthermore, the magnitude of the apparent saturation polarization is 72% higher in the high twin density samples than that in the low twin density samples. Twin engineering might be applied universally to all ferroelectric ceramics and films to substantially enhance their performance.

Original languageEnglish (US)
Pages (from-to)404-412
Number of pages9
JournalActa Materialia
Volume97
DOIs
StatePublished - Jul 17 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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