The Evidence of Giant Surface Flexoelectric Field in (111) Oriented BiFeO3 Thin Film
Yang, TY; Zhang, XM; Chen, B; Guo, HZ; Jin, KJ; Wu, XS; Gao, XY; Li, Z; Wang, C; Li, XL
2017
发表期刊ACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
卷号9期号:6页码:5600-5606
文章类型期刊论文
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.
关键词Surface Layer Ferroelectric Thin Films X-ray Diffraction Flexoelectrics Microstructure
DOI10.1021/acsami.6b15162
收录类别SCI
语种英语
WOS记录号WOS:000394481800063
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/27475
专题中科院上海应用物理研究所2011-2018年
推荐引用方式
GB/T 7714
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,2017,9(6):5600-5606.
APA Yang, TY.,Zhang, XM.,Chen, B.,Guo, HZ.,Jin, KJ.,...&Li, XL.(2017).The Evidence of Giant Surface Flexoelectric Field in (111) Oriented BiFeO3 Thin Film.ACS APPLIED MATERIALS & INTERFACES,9(6),5600-5606.
MLA Yang, TY,et al."The Evidence of Giant Surface Flexoelectric Field in (111) Oriented BiFeO3 Thin Film".ACS APPLIED MATERIALS & INTERFACES 9.6(2017):5600-5606.
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