Journal
ACTA MATERIALIA
Volume 97, Issue -, Pages 404-412Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2015.07.009
Keywords
Ferroelectrics; Polycrystalline thin film; {111} Twin; Reduced coercive field; Domain switching
Funding
- Hong Kong Research Grants Council [622911]
- United States National Science Foundation [DMR-1006541]
- Natural Science Foundation of China [11321202]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1006541] Funding Source: National Science Foundation
Ask authors/readers for more resources
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 {111} 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. (C) 2015 Acts Materialia Inc. Published by Elsevier Ltd: All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available