Quantitative analysis of the direct piezoelectric response of bismuth ferrite films by scanning probe microscopy

Polarisation domain structure is a microstructure specific to ferroelectrics and plays a role in their various fascinating characteristics. The piezoelectric properties of ferroelectrics are influenced by the domain wall contribution. This study provides a direct observation of the contribution of d...

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Bibliographic Details
Published in:Scientific reports 2019-12, Vol.9 (1), p.19727-8, Article 19727
Main Authors: Kariya, Kento, Yoshimura, Takeshi, Ujimoto, Katsuya, Fujimura, Norifumi
Format: Article
Language:English
Subjects:
639/301/119/996
639/301/930/328/968
Bismuth
Ferroelectrics
Humanities and Social Sciences
Measurement techniques
Microscopy
multidisciplinary
Polarization
Quantitative analysis
Scanning
Science
Science (multidisciplinary)
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Summary:Polarisation domain structure is a microstructure specific to ferroelectrics and plays a role in their various fascinating characteristics. The piezoelectric properties of ferroelectrics are influenced by the domain wall contribution. This study provides a direct observation of the contribution of domain walls to the direct piezoelectric response of bismuth ferrite (BiFeO 3 ) films, which have been widely studied as lead-free piezoelectrics. To achieve this purpose, we developed a scanning probe microscopy-based measurement technique, termed direct piezoelectric response microscopy (DPRM), to observe the domain structure of BiFeO 3 films via the direct piezoelectric response. Quantitative analysis of the direct piezoelectric response obtained by DPRM, detailed analysis of the domain structure by conventional piezoelectric force microscopy, and microscopic characterisation of the direct piezoelectric properties of BiFeO 3 films with different domain structures revealed that their direct piezoelectric response is enhanced by the walls between the domains of spontaneous polarisation in the same out-of-plane direction.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-56261-w