DataVXAdvanced Functional MaterialsPaper
journal article·2020-04Open access

Constructing Polymorphic Nanodomains in BaTiO3 Films via Epitaxial Symmetry Engineering

Wei Peng, Jacob A. Zorn, Junsik Mun, Muhammad Sheeraz, Chang Jae Roh, Jun Pan, Bo Wang, Kun Guo, Chang Won Ahn, Yaping Zhang, Kui Yao, Jong Seok Lee, Jin‐Seok Chung, Tae Heon Kim, Long‐Qing Chen, Miyoung Kim, Lingfei Wang, Tae Won Noh

Advanced Functional Materials· Volume 30· Issue 16
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Source abstract

Abstract

Abstract Ferroelectric materials owning a polymorphic nanodomain structure usually exhibit colossal susceptibilities to external mechanical, electrical, and thermal stimuli, thus holding huge potential for relevant applications. Despite the success of traditional strategies by means of complex composition design, alternative simple methods such as strain engineering have been intensively sought to achieve a polymorphic nanodomain state in lead‐free, simple‐composition ferroelectric oxides in recent years. Here, a nanodomain configuration with morphed structural phases is realized in an epitaxial BaTiO3 film grown on a (111)‐oriented SrTiO3 substrate. Using a combination of experimental and theoretical approaches, it is revealed that a threefold rotational symmetry element enforced by the epitaxial constraint along the [111] direction of BaTiO3 introduces considerable instability among intrinsic tetragonal, orthorhombic, and rhombohedral phases. Such phase degeneracy induces ultrafine ferroelectric nanodomains (1–10 nm) with low‐angle domain walls, which exhibit significantly enhanced dielectric and piezoelectric responses compared to the (001)‐oriented BaTiO3 film with uniaxial ferroelectricity. Therefore, the finding highlights the important role of epitaxial symmetry in domain engineering of oxide ferroelectrics and facilitates the development of dielectric capacitors and piezoelectric devices.
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Research context

NanomaterialsElectronic materials

OpenAlex topics: Ferroelectric and Piezoelectric Materials · Multiferroics and related materials · Acoustic Wave Resonator Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Correlated Electron Systems Institute for Basic Science Seoul 08826 Republic of Korea

Department of Physics and Astronomy Seoul National University Seoul 08826 Republic of Korea

Department of Materials Science and Engineering Pennsylvania State University University Park PA 16802 USA

Department of Materials Science and Engineering and Research Institute of Advanced Materials Seoul National University Seoul 08826 Republic of Korea

Department of Physics and Energy Harvest‐Storage Research Center (EHSRC) University of Ulsan Ulsan 44610 Republic of Korea

Department of Physics and Photon Science Gwangju Institute of Science and Technology Gwangju 61005 Republic of Korea

College of Materials Science and Engineering Zhejiang University of Technology Hangzhou 310014 P. R. China

Institute of Materials Research and Engineering A*STAR (Agency for Science, Technology and Research) Singapore 138634 Singapore

Imaging and Characterization Core Lab King Abdullah University of Science and Technology Thuwal 23955‐6900 Kingdom of Saudi Arabia

Department of Physics Soongsil University Seoul 06978 Republic of Korea

Funding

U.S. Department of Energy · Office of Science · Basic Energy Sciences · National Science Foundation · National Research Foundation of Korea · Ministry of Science, ICT and Future Planning

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