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Study on superstructure in ion co-doped BiFeO3 by using transmission electron microscopy |
Pu Shi-Zhou (蒲十周)a b, Guo Chao (郭超)a b, Li Mei-Ya (李美亚)a, Chen Zhen-Lian (陈珍莲)c, Zou Hua-Min (邹化民)a b |
a Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China; b Center for Electron Microscopy, Wuhan University, Wuhan 430072, China; c Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China |
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Abstract La3+ and V5+ co-doped BiFeO3 ceramics are synthesized by rapid liquid sintering technique. The modulated structure in Bi0.85La0.15Fe0.97V0.03O3 is investigated by using transmission electron microscopy (TEM). Two kinds of superstructures are observed in the samples. One is the component modulated superstructure and twin-domain, which is generated by La3+ ordered substitution for Bi3+ and frequently appears. The chemical composition of the superstructure is explored by x-ray energy dispersive spectroscopy (EDS). The model of the ordered structure is proposed. Simulation based on the model is conducted. The second is the fluorite-type δ-Bi2O3 related superstructure. The relation between the ferroelectric property and the microstructure of the sample is also discussed.
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Received: 26 September 2014
Revised: 30 October 2014
Accepted manuscript online:
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PACS:
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61.05.jm
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(Convergent-beam electron diffraction, selected-area electron diffraction, nanodiffraction)
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77.80.Dj
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(Domain structure; hysteresis)
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61.72.-y
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(Defects and impurities in crystals; microstructure)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51372174, 11074193, and 51132001) and the Fundamental Research Funds for the Central Universities. |
Corresponding Authors:
Zou Hua-Min
E-mail: hmzou@whu.edu.cn
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Cite this article:
Pu Shi-Zhou (蒲十周), Guo Chao (郭超), Li Mei-Ya (李美亚), Chen Zhen-Lian (陈珍莲), Zou Hua-Min (邹化民) Study on superstructure in ion co-doped BiFeO3 by using transmission electron microscopy 2015 Chin. Phys. B 24 046101
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