Volume 18, Issue 3 2104213
Research Article

Highly Flexible Freestanding BaTiO3-CoFe2O4 Heteroepitaxial Nanostructure Self-Assembled with Room-Temperature Multiferroicity

Gaokuo Zhong

Corresponding Author

Gaokuo Zhong

Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055 China

E-mail: [email protected]; [email protected]; [email protected]

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Feng An

Corresponding Author

Feng An

Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055 China

E-mail: [email protected]; [email protected]; [email protected]

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Ke Qu

Ke Qu

Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055 China

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Yongqi Dong

Yongqi Dong

Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055 China

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029 China

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Zhenzhong Yang

Zhenzhong Yang

Key Laboratory of Polar Materials and Devices, East China Normal University, Shanghai, Shanghai, 200241 China

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Liyufen Dai

Liyufen Dai

School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan, 411105 China

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Shuhong Xie

Shuhong Xie

School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan, 411105 China

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Rong Huang

Rong Huang

Key Laboratory of Polar Materials and Devices, East China Normal University, Shanghai, Shanghai, 200241 China

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Zhenlin Luo

Zhenlin Luo

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029 China

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Jiangyu Li

Corresponding Author

Jiangyu Li

Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055 China

Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China

Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, Guangdong, 518055 China

E-mail: [email protected]; [email protected]; [email protected]

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First published: 23 November 2021
Citations: 17

Abstract

Multiferroics with simultaneous electric and magnetic orderings are highly desirable for sensing, actuation, data storage, and bio-inspired systems, yet developing flexible materials with robust multiferroic properties at room temperature is a long-term challenge. Utilizing water-soluble Sr3Al2O6 as a sacrificial layer, the authors have successfully self-assembled a freestanding BaTiO3-CoFe2O4 heteroepitaxial nanostructure via pulse laser deposition, and confirmed its epitaxial growth in both out-of-plane and in-plane directions, with highly ordered CoFe2O4 nanopillars embedded in a single crystalline BaTiO3 matrix free of substrate constraint. The freestanding nanostructure enjoys super flexibility and mechanical integrity, not only capable of spontaneously curving into a roll, but can also be bent with a radius as small as 4.23 µm. Moreover, piezoelectricity and ferromagnetism are demonstrated at both microscopic and macroscopic scales, confirming its robust multiferroicity at room temperature. This work establishes an effective route for flexible multiferroic materials, which have the potential for various practical applications.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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