Raman scattering investigations on lanthanum-doped Bi{sub 4}Ti{sub 3}O{sub 12}-SrBi{sub 4}Ti{sub 4}O{sub 15} intergrowth ferroelectrics

Journal Article · Thu Sep 15 00:00:00 EDT 2005 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2005.06.028· OSTI ID:20729092

Jun, Zhu ^[1]; Xiaobing, Chen ^[1]; Junhui, He ^[1]; Jiancang, Shen ^[2]

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1. College of Physics Science and Technology, Yangzhou University, Yangzhou 225002 (China)
2. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210008 (China)

The ferroelectric ceramics of Bi{sub 4}Ti{sub 3}O{sub 12}, SrBi{sub 4}Ti{sub 4}O{sub 15}, and lanthanum-doped Bi{sub 4}Ti{sub 3}O{sub 12}-SrBi{sub 4}Ti{sub 4}O{sub 15} were synthesized, and their Raman spectra were investigated. La-doping resulted in the enlargement of remnant polarization of Bi{sub 4}Ti{sub 3}O{sub 12}-SrBi{sub 4}Ti{sub 4}O{sub 15}. The structure of the Bi{sub 2}O{sub 2} layers and TiO{sub 6} octahedra of the intergrowth was found to be different from those of Bi{sub 4}Ti{sub 3}O{sub 12} and SrBi{sub 4}Ti{sub 4}O{sub 15}. La{sup 3+} ions exhibit pronounced selectivity for the occupation of A site as La content is lower than 0.50, and tend to be incorporated into Bi{sub 2}O{sub 2} layers when the La content is higher than 0.50. Lanthanum substitution brings about the structural phase transition in Bi{sub 4}Ti{sub 3}O{sub 12}-SrBi{sub 4}Ti{sub 4}O{sub 15}. The variation of ferroelectric property may be attributed to combined contribution from the decreasing of the oxygen vacancies, the relaxation of the lattice distortion, the destroying of the insulation and the space charge compensation effects of the Bi{sub 2}O{sub 2} slabs.

• OSTI ID: 20729092
• Journal Information: Journal of Solid State Chemistry, Vol. 178, Issue 9; Other Information: DOI: 10.1016/j.jssc.2005.06.028; PII: S0022-4596(05)00289-6; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BISMUTH COMPOUNDS
CERAMICS
DOPED MATERIALS
FERROELECTRIC MATERIALS
LANTHANUM IONS
LAYERS
OXIDES
PHASE TRANSFORMATIONS
POLARIZATION
RAMAN EFFECT
RAMAN SPECTRA
SPACE CHARGE
STRONTIUM COMPOUNDS
TITANIUM COMPOUNDS
VACANCIES