期刊
ACTA MATERIALIA
卷 97, 期 -, 页码 404-412出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2015.07.009
关键词
Ferroelectrics; Polycrystalline thin film; {111} Twin; Reduced coercive field; Domain switching
资金
- 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
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据