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Integrated Ferroelectrics
An International Journal
Volume 118, 2010 - Issue 1
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Original Articles

Impedance and Pyroelectric Measurements on Sm3+/Dy3+ and Nb5+ Modified Bi4Ti3O12 Ceramic

N. V. Prasad Materials Research Laboratory Department of Physics, Osmania University, Hyderabad, India, 500007
,
K. Sreenu Materials Research Laboratory Department of Physics, Osmania University, Hyderabad, India, 500007
,
G. Prasad Materials Research Laboratory Department of Physics, Osmania University, Hyderabad, India, 500007
&
G. S. Kumar Materials Research Laboratory Department of Physics, Osmania University, Hyderabad, India, 500007
Pages 76-85 | Received 26 Nov 2009, Accepted 27 Feb 2010, Published online: 01 Dec 2010
 
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Abstract

Tri-Valent (Sm3+/ Dy3+) and pentavalent (Nb5+) modified polycrystalline material of Aurivillius family, namely R0.75Bi3.25Ti2.9625.Nb0.03O12 (R = Sm, Dy), were prepared by conventional solid-state reaction method. Impedance and pyroelectric measurements were carried out to understand the electrical properties of the samples. Master plots were drawn to understand the defect role, especially vacancies, and the results were corroborated with the dc-conductivity data. Finally, both the complex impedance spectroscopic as well as pyroelectric results were compared with the impedance data of technological important materials, namely La0.75Bi3.25Ti3O12 (BLT) and lead zirconium titanate (PZT) for the further understanding of defects and its effects at the grain interfaces.

Acknowledgments

NVP thanks Department of Science and Technology, New Delhi for sanctioning the SERC-DST Fast track Young Scientist Proposals (SR/FTP/PS-32/2003).

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