Investigation on dependence of BiFeO3 dielectric property on oxygen
content

doi:10.1088/1674-1056/19/7/077702

中国物理B ›› 2010, Vol. 19 ›› Issue (7): 77702-077702.doi: 10.1088/1674-1056/19/7/077702

Investigation on dependence of BiFeO₃ dielectric property on oxygen content

娄艳辉, 宋桂林, 常方高, 王照奎

Department of Physics, Henan Normal University, Xinxiang 453007, China

出版日期:2010-07-15 发布日期:2010-07-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 60571063).

Investigation on dependence of BiFeO₃ dielectric property on oxygen content

Lou Yan-Hui(娄艳辉), Song Gui-Lin(宋桂林), Chang Fang-Gao(常方高), and Wang Zhao-Kui(王照奎)^†

Department of Physics, Henan Normal University, Xinxiang 453007, China

Online:2010-07-15 Published:2010-07-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 60571063).

摘要/Abstract

摘要： The influence of oxygen content on the dielectric property of BiFeO₃ ceramics is studied by experiment and first-principles calculation. The experimental result demonstrates that the dielectric constant of BiFeO₃ is strongly dependent on introduced oxygen and oxygen vacancies. By comparison with BiFeO₃, the introduced oxygen and oxygen vacancies can lead to a reduction in dielectric constant of BiFeO_$\delta$ at a lower frequency. The first-principles calculation also shows a similar result when photon energy is in a range of 2.0—4.1 eV. A likely explanation is that this oxygen content dependence may be ascribed to the distortion of Fe—O octahedron structure due to oxygen vacancies or excess oxygen ions in the crystal structure of BiFeO₃.

Abstract: The influence of oxygen content on the dielectric property of BiFeO₃ ceramics is studied by experiment and first-principles calculation. The experimental result demonstrates that the dielectric constant of BiFeO₃ is strongly dependent on introduced oxygen and oxygen vacancies. By comparison with BiFeO₃, the introduced oxygen and oxygen vacancies can lead to a reduction in dielectric constant of BiFeO_$\delta$ at a lower frequency. The first-principles calculation also shows a similar result when photon energy is in a range of 2.0—4.1 eV. A likely explanation is that this oxygen content dependence may be ascribed to the distortion of Fe—O octahedron structure due to oxygen vacancies or excess oxygen ions in the crystal structure of BiFeO₃.

Key words: BiFeO₃, dielectric property, oxygen content

中图分类号: (Permittivity (dielectric function))

77.22.Ch

61.72.J- (Point defects and defect clusters) 61.66.Fn (Inorganic compounds)

娄艳辉, 宋桂林, 常方高, 王照奎. Investigation on dependence of BiFeO₃ dielectric property on oxygen content[J]. 中国物理B, 2010, 19(7): 77702-077702.

Lou Yan-Hui(娄艳辉), Song Gui-Lin(宋桂林), Chang Fang-Gao(常方高), and Wang Zhao-Kui(王照奎). Investigation on dependence of BiFeO₃ dielectric property on oxygen content[J]. Chin. Phys. B, 2010, 19(7): 77702-077702.

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Investigation on dependence of BiFeO₃ dielectric property on oxygen content

Investigation on dependence of BiFeO₃ dielectric property on oxygen content

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