Geometry confined polar vertex domains in self-assembled BiFeO3 nano-islands. Issue 10 (3rd October 2019)

• Record Type: Journal Article
• Authors: Ma, Ji; Wang, Jing; Chen, Mingfeng; Peng, Ren-Ci; Ma, Jing; Zhang, Jinxing; Nan, Ce-Wen
• Is Part Of: Materials research letters. Volume 7:Issue 10(2019)
• Page Start: 399
• Page End: 404
• Publication Date: 2019-10-03
• Subjects: Ferroelectric topological textures -- BiFeO3 -- self-assembled nano-islands -- threefold/fourfold vertex domain; Materials science -- Research -- Periodicals; Biomedical materials -- Research -- Periodicals; Composite materials -- Research -- Periodicals; Biomedical materials -- Research; Composite materials -- Research; Materials science -- Research; Periodicals; 620.1105
• DOI: 10.1080/21663831.2019.1619631
• Languages: English
• ISSNs: 2166-3831

Abstract

ABSTRACT: Low-dimensional ferroelectric topological textures show abundant configurations such as flux-closure quadrants and vortices, suggesting potential applications in nano-electronic devices. However, the deterministic control of those polar textures is still challenging. By using piezoresponse force microscopy, threefold or fourfold vertex domain structures were observed in self-assembled BiFeO3 nano-islands, and the formation of such polar topological textures is strongly dependent on the size and shape of the nano-island. Furthermore, the vertex domain textures confined by geometry can be reversibly switched back and forth by external electric field, which are stabilized by the competition between elastic energy and electrostatic energy. GRAPHICAL ABSTRACT: IMPACT STATEMENT: Stable threefold or fourfold vertex domain structures are formed on BiFeO3 nano-islands, depending on the size and shape of the nanoisland.