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Microstructural influence on piezoresponse and leakage current behavior of Na0.5Bi0.5TiO3 Thin Films

Published online by Cambridge University Press:  16 May 2016

Kumaraswamy Miriyala  and
Ranjith Ramadurai
Kumaraswamy Miriyala
Affiliation:
Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana - 502285, India.
Ranjith Ramadurai*
Affiliation:
Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana - 502285, India.
*
*Corresponding Author: Tel. : +91-40-2301 7046 ; E-mail: ranjith@iith.ac.in
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Abstract

Sodium bismuth titanate (Na0.5Bi0.5TiO3: NBT) a lead free piezoelectric; exhibits promising features such that it could be an alternate to lead based piezoelectrics. In this work, we report the microstructural influence on piezoelectric and leakage current behavior of NBT thin films grown by pulsed laser ablation (PLD). Various microstructural features like coarse faceted grains and fine spherical grains was achieved by effective optimization of substrate temperature and oxygen partial pressures. The studies reveals that, leakage current of NBT thin films were dominated by interface limited modified Schottky emission type of conduction. The piezoelectric domain studies reveal that for NBT thin films with fine spherical grain the domain pattern was highly dominated by the morphology and in the case of coarse faceted grains the domains were relatively large and the domains were extending beyond the grain boundaries.

Keywords

thin filmlaser ablationpiezoelectric
Type
Articles
Information
MRS Advances , Volume 1 , Issue 37: Nanotechnology , 2016 , pp. 2597 - 2602
Copyright
Copyright © Materials Research Society 2016 

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