Ultralow Strain-Induced Emergent Polarization Structures in a Flexible Freestanding BaTiO3 Membrane

Jie Wang; Zhen Liu; Qixiang Wang; Fang Nie; Yanan Chen; Gang Tian; Hong Fang; Bin He; Jinrui Guo; Limei Zheng; Changjian Li; Weiming Lü; Shishen Yan

doi:10.1002/advs.202401657

Ultralow Strain-Induced Emergent Polarization Structures in a Flexible Freestanding BaTiO₃ Membrane

Adv Sci (Weinh). 2024 Apr 22:e2401657. doi: 10.1002/advs.202401657. Online ahead of print.

Authors

Jie Wang^{1

2

3}, Zhen Liu⁴, Qixiang Wang¹, Fang Nie³, Yanan Chen¹, Gang Tian³, Hong Fang^{1

2

3}, Bin He¹, Jinrui Guo¹, Limei Zheng³, Changjian Li^{5

6}, Weiming Lü^{1

2}, Shishen Yan^{1

3}

Affiliations

¹ Spintronics Institute, School of Physics and Technology, University of Jinan, Jinan, 250022, China.
² Functional Materials and Acousto-Optic Instruments Institute, School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin, 150080, China.
³ School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China.
⁴ School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
⁵ Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China.
⁶ Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China.

PMID: 38647365
DOI: 10.1002/advs.202401657

Abstract

The engineering of ferroic orders, which involves the evolution of atomic structure and local ferroic configuration in the development of next-generation electronic devices. Until now, diverse polarization structures and topological domains are obtained in ferroelectric thin films or heterostructures, and the polarization switching and subsequent domain nucleation are found to be more conducive to building energy-efficient and multifunctional polarization structures. In this work, a continuous and periodic strain in a flexible freestanding BaTiO₃ membrane to achieve a zigzag morphology is introduced. The polar head/tail boundaries and vortex/anti-vortex domains are constructed by a compressive strain as low as ≈0.5%, which is extremely lower than that used in epitaxial rigid ferroelectrics. Overall, this study c efficient polarization structures, which is of both theoretical value and practical significance for the development of next-generation flexible multifunctional devices.

Keywords: freestanding membrane; polarization; strain engineering; vortex; zigzag morphology.

Abstract

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