CAS OpenIR  > 中科院上海应用物理研究所2011-2018年
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
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume9Issue:6Pages:5600-5606
Subtype期刊论文
AbstractIn 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.
KeywordSurface Layer Ferroelectric Thin Films X-ray Diffraction Flexoelectrics Microstructure
DOI10.1021/acsami.6b15162
Indexed BySCI
Language英语
WOS IDWOS:000394481800063
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/27475
Collection中科院上海应用物理研究所2011-2018年
Recommended Citation
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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