NDLI: Effects of Europium Substitution on the Microstructure and Electric Properties of Bismuth Ferrite Ceramics

Content Provider	Springer Nature Link
Author	Dai, Haiyang Li, Tao Xue, Renzhong Chen, Zhenping Xue, Yuncai
Copyright Year	2011
Abstract	Bi$_{1−x }$Eu$_{ x }$FeO$_{3}$ (x=0.00–0.15) ceramics were synthesized by solid state reaction method with rapid liquid phase sintering process at different europium content and the microstructure and electrical properties of the samples were investigated. X-ray diffraction (XRD) studies show that europium substitution has changed the structure of BiFeO$_{3}$ from rhombohedral R3c to orthorhombic Pnma and decreased the impurity phase. Raman spectra results also conform that a structure transition occurs at about x=0.20, and indicate that the Eu substitution at Bi site can obviously affect the Bi–O bond. Impedance analyzer measurements show that both dielectric constant and dielectric loss are strongly dependent on the Eu content. The dielectric constant of the Bi$_{1−x }$Eu$_{ x }$FeO$_{3}$ increases with increasing Eu content from 0.00 to 0.20, then decreases with increasing Eu content from 0.20 to 0.30. The dielectric constant measured at 100 Hz is 542.0 for the x=0.20 sample, which is about 8.5 times as big as that for unsubsitituted BiFeO$_{3}$. The dielectric loss can be effectively decreased by the substitution of Eu for Bi. In addition, the leakage current measurements show that the substitution of Eu can effectively reduce the leakage current density of BiFeO$_{3}$.
Starting Page	109
Ending Page	115
Page Count	7
File Format	PDF
ISSN	15571939
Journal	Journal of Superconductivity and Novel Magnetism
Volume Number	25
Issue Number	1
e-ISSN	15571947
Language	English
Publisher	Springer US
Publisher Date	2011-08-02
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bi$_{1−x }$Eu$_{ x }$FeO$_{3}$ Solid state reaction Microstructure Electric properties Strongly Correlated Systems, Superconductivity Characterization and Evaluation of Materials Magnetism, Magnetic Materials Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics

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