Formation of Polar Topological Domains in Wrinkled Bulges in Freestanding BiFeO <sub>3</sub> Thin Films
Abstract This work presents a voltage‐free strategy for creating and manipulating topological domains in freestanding BiFeO 3 films via the flexoelectric effect. By introducing bulge‐like surface wrinkles into freestanding films, complexed polarization topological textures can be formed, i.e., center‐type domain state with a cylinder bubble domain pattern along the vertical direction. This can be interpreted by the flexoelectric effect arising from the bulge topology, as verified by the phase‐field simulation results. The observed center topological texture can also allow reversible switching between the center divergent state and the mosaic‐like state driven by applying an electric field. The results provide a good example for the construction of topological domains via flexoelectric engineering, and offer opportunities for on‐demand design of polar topological structures for certain nanoelectronics applications.
Authors
- Zhen Hong Fan (ORCID: https://orcid.org/0000-0002-1756-641X)
- Jun‐Ming Liu (ORCID: https://orcid.org/0000-0001-8988-8429)
- Minghui Qin (ORCID: https://orcid.org/0000-0002-8306-125X)
- Xingsen Gao (ORCID: https://orcid.org/0000-0002-2725-0785)
- Jiyan Dai (ORCID: https://orcid.org/0000-0002-7720-8032)
- Chao Chen (ORCID: https://orcid.org/0000-0001-9743-3360)
- Jie Wang (ORCID: https://orcid.org/0000-0002-5896-5396)
- Guo Tian (ORCID: https://orcid.org/0000-0001-7481-0944)
- Jianbiao Xian
- Z. Mo
- Sizheng Zheng (ORCID: https://orcid.org/0000-0002-0965-5922)
Institutions
- Hong Kong Polytechnic University (HK)
- South China Normal University (CN)
- Zhejiang Lab (CN)
- Collaborative Innovation Center of Advanced Microstructures (CN)
- Zhejiang University (CN)
- Nanjing University (CN)
Publication Details
- Journal
- Advanced Functional Materials
- Published
- 2025-04-21
- DOI
- https://doi.org/10.1002/adfm.202416311
- Citations
- 2
- Primary Topic
- Advanced Materials and Mechanics
- Type
- article
- Field-Weighted Citation Impact
- 1.43
Funders
- National Natural Science Foundation of China
- Basic and Applied Basic Research Foundation of Guangdong Province