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题名:
The Evidence of Giant Surface Flexoelectric Field in (111) Oriented BiFeO3 Thin Film
作者: Yang, TY; Zhang, XM; Chen, B; Guo, HZ; Jin, KJ; Wu, XS; Gao, XY; Li, Z; Wang, C; Li, XL
刊名: ACS APPLIED MATERIALS & INTERFACES
出版日期: 2017
卷号: 9, 期号:6, 页码:5600-5606
关键词: Surface layer ; ferroelectric thin films ; X-ray diffraction ; flexoelectrics ; microstructure
DOI: 10.1021/acsami.6b15162
文章类型: 期刊论文
英文摘要: In this work, the surface structure of a single-domain epitaxial BiFeO3 film with (111) orientation was investigated by in situ grazing incidence X-ray diffraction and X-ray reflectivity. We found that a large strain gradient exists in the surface region (2-3 nm) of the BiFeO3 film. The strain gradient is approximately 10(7) m(-1), which is 2 or 3 orders of magnitude larger than the value inside the film. Moreover, we found that a surface layer with a lower electron density compared with the underlying BiFeO3 layer exists on the surface of BiFeO3 film, and this layer exhibits an irreversible surface structure transition occurs at 500 K, which should be associated with the surface flexoelectric field. We considered that this large strain gradient is originated from the surface depolarization field of ferroelectrics. Our results suggest a coupling between the surface structure and the flexoelectricity and imply that the surface layer and properties would be controlled by the strain gradient in ferroelectric films.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000394481800063
ISSN号: 1944-8244
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27475
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Yang, TY,Zhang, XM,Chen, B,et al. The Evidence of Giant Surface Flexoelectric Field in (111) Oriented BiFeO3 Thin Film[J]. ACS APPLIED MATERIALS & INTERFACES,2017-01-01,9(6):5600-5606.
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文件名: The Evidence of Giant Surface Flexoelectric Field in (111) Oriented BiFeO3 Thin Film.pdf
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