Studies on electrical properties of SrBi4Ti4−3xFe4xO15

The system SrBi4Ti4−3xFe4xO15 belonging to bismuth layer structured ferroelectric (BLSF) materials withx = 0, 0.1 and 0.2 has been prepared through solid-state double sintering method. Increase of iron content in SrBi4Ti4O15 resulted in densification of the samples. The normal puckering observed in...

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Bibliographic Details
Published in:Bulletin of materials science 2000-10, Vol.23 (5), p.431-437
Main Authors: Venkat Ramulu, N, Prasad, G, Suryanarayana, S. V, Bhima Sankaram, T
Format: Article
Language:English
Subjects:
Bismuth
Densification
Distortion
Electrical properties
Ferroelectric materials
Ferroelectricity
Iron
Temperature
Transition temperature
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Summary:The system SrBi4Ti4−3xFe4xO15 belonging to bismuth layer structured ferroelectric (BLSF) materials withx = 0, 0.1 and 0.2 has been prepared through solid-state double sintering method. Increase of iron content in SrBi4Ti4O15 resulted in densification of the samples. The normal puckering observed in the sample has been found to decrease and the lattice distortion increased. Dielectric measurements indicate the ferroelectric transition temperature of the samples to be 530°C, 560°C and 606°C. The increase of transition temperature with increasing iron content is correlated with lattice distortion. Conductivity measurements show two slopes and the activation energies have been found to increase with the iron content. Impedance spectroscopy measurements confirm insulating behaviour at lower temperatures. With increase in temperature the samples become conducting and show relaxational effects. The Cole-Cole plots at higher temperatures are found to be semicircles. The relaxation times decrease with the increase of iron content.
ISSN:0250-4707
0973-7669
DOI:10.1007/BF02708395