Large-scale multiferroic complex oxide epitaxy with magnetically switched polarization enabled by solution processing

Author:

Liu Cong1,An Feng12,Gharavi Paria S M3,Lu Qinwen4,Zha Junkun4,Chen Chao5,Wang Liming6,Zhan Xiaozhi6,Xu Zedong7,Zhang Yuan2,Qu Ke18,Yao Junxiang1,Ou Yun19,Zhao Zhiming2,Zhong Xiangli2,Zhang Dongwen10,Valanoor Nagarajan3,Chen Lang7,Zhu Tao61112,Chen Deyang5,Zhai Xiaofang4,Gao Peng8,Jia Tingting1,Xie Shuhong2,Zhong Gaokuo1,Li Jiangyu1

Affiliation:

1. Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518005, China

2. School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China

3. School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia

4. Hefei National Laboratory for Physical Sciences at Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China

5. Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China

6. Dongguan Neutron Science Center, Dongguan 523803, China

7. Department of Physics, Southern University of Science and Technology, Shenzhen 518005, China

8. International Center for Quantum Materials and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, China

9. Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 411201, China

10. Department of Physics, College of Science, National University of Defense Technology, Changsha 410073, China

11. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

12. Songshan Lake Materials Laboratory, Dongguan Neutron Science Center, Dongguan 523808, China

Abstract

Abstract Complex oxides with tunable structures have many fascinating properties, though high-quality complex oxide epitaxy with precisely controlled composition is still out of reach. Here we have successfully developed solution-based single-crystalline epitaxy for multiferroic (1-x)BiTi(1-y)/2FeyMg(1-y)/2O3–(x)CaTiO3 (BTFM–CTO) solid solution in large area, confirming its ferroelectricity at the atomic scale with strong spontaneous polarization. Careful compositional tuning leads to a bulk magnetization of 0.07 ± 0.035 μB/Fe at room temperature, enabling magnetically induced polarization switching exhibiting a large magnetoelectric coefficient of 2.7–3.0 × 10−7 s/m. This work demonstrates the great potential of solution processing in large-scale complex oxide epitaxy and establishes novel room-temperature magnetoelectric coupling in epitaxial BTFM–CTO film, making it possible to explore a much wider space of composition, phase, and structure that can be easily scaled up for industrial applications.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

Shenzhen Science and Technology Innovation Committee

Key Area R&D Program of Guangdong Province

Hong Kong, Macao and Taiwan Science & Technology Cooperation Program of China

Publisher

Oxford University Press (OUP)

Subject

Multidisciplinary

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