Large-scale multiferroic complex oxide epitaxy with magnetically switched polarization enabled by solution processing. Issue 1 (8th October 2019)

• Record Type: Journal Article
• Authors: Liu, Cong; An, Feng; Gharavi, Paria S M; Lu, Qinwen; Zha, Junkun; Chen, Chao; Wang, Liming; Zhan, Xiaozhi; Xu, Zedong; Zhang, Yuan; Qu, Ke; Yao, Junxiang; Ou, Yun; Zhao, Zhiming; Zhong, Xiangli; Zhang, Dongwen; Valanoor, Nagarajan; Chen, Lang; Zhu, Tao; Chen, Deyang; Zhai, Xiaofang; Gao, Peng; Jia, Tingting; Xie, Shuhong; Zhong, Gaokuo; Li, Jiangyu
• Is Part Of: National science review. Volume 7:Issue 1(2020)
• Page Start: 84
• Page End: 91
• Publication Date: 2019-10-08
• Subjects: complex oxide -- solution method -- epitaxy -- multiferroic; Science -- Periodicals; 505
• DOI: 10.1093/nsr/nwz143
• Languages: English
• ISSNs: 2095-5138

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 )/2 Fe y Mg(1- y )/2 O3 –( 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.