Ferroelectric and Dielectric Behavior of Samarium-Substituted Bi4Ti3O12 Nanomaterials Synthesized by Gel Combustion Method

Samarium (Sm) substituted bismuth titanate (Bi 4 Ti 3 O 12 , BT) nanoparticles with compositions of Bi 4−x Sm x Ti 3 O 12 (BSmT) (where x = 0.0, 0.25, 0.50, 0.75, 1.0) were prepared by using the gel combustion method. X-ray diffraction pattern of prepared nanoparticles confirmed that all the BSmT co...

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Bibliographic Details
Published in:Transactions of the Indian Institute of Metals 2017-05, Vol.70 (4), p.903-908
Main Authors: Selvamurugan, V., Marikani, A., Mangamma, G., Madhavan, D., Kamruddin, M., Dash, Sitaram, Tyagi, A. K.
Format: Article
Language:English
Subjects:
Bismuth titanate
Chemistry and Materials Science
Coercivity
Combustion
Composition
Corrosion and Coatings
Dielectric loss
Dielectrics
Diffraction patterns
Ferroelectric materials
Ferroelectricity
Leakage current
Materials Science
Metallic Materials
Nanomaterials
Nanoparticles
Samarium
Substitutes
Technical Paper
Tribology
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Summary:Samarium (Sm) substituted bismuth titanate (Bi 4 Ti 3 O 12 , BT) nanoparticles with compositions of Bi 4−x Sm x Ti 3 O 12 (BSmT) (where x = 0.0, 0.25, 0.50, 0.75, 1.0) were prepared by using the gel combustion method. X-ray diffraction pattern of prepared nanoparticles confirmed that all the BSmT compositions were of the single phase orthorhombic structure with the space group of B2ab. The dielectric loss at 100 Hz varied from 0.0925 to 0.056 with an increase in Samarium content. Dielectric loss confirmed the lower leakage current of BSmT nanoparticles. The ferroelectric behavior of BSmT nanoparticles showed that the Bi 3.50 Sm 0.50 Ti 3 O 12 had good ferroelectric property and also had minimum leakage current. The increase of coercive field (Ec) and the increase of remnant polarizations (Pr) were pronounced with the increase in Sm content confirming to the fact that the substitution of Sm 3+ had improved the ferroelectric properties of BT.
ISSN:0972-2815
0975-1645
DOI:10.1007/s12666-016-0883-y