Tunable ferroelectric domain orientation in polycrystalline and highly oriented Na0.5Bi0.5TiO3 Thin Films

Miriyala, K and Ramadurai, Ranjit (2016) Tunable ferroelectric domain orientation in polycrystalline and highly oriented Na0.5Bi0.5TiO3 Thin Films. Materials Letters, 178. pp. 23-26. ISSN 0167-577X

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Abstract

Sodium bismuth titanate (Na0.5Bi0.5TiO3: NBT) has shown promising piezoelectric properties as an alternate to lead based piezoelectrics. NBT films with preferred crystalline orientation along <220> and polycrystalline features were fabricated on commercially available (111) Pt coated Si substrates by pulsed laser deposition (PLD). Ferroelectric domain patterns of NBT film with preferred orientation along <220> exhibited a variable in-plane piezoresponse in comparison to the out-of plane response. The presence of dominating planar components of the spontaneous polarization (Ps<111>) of NBT with rhombohedral structure could be responsible for the difference in planar response with respect to the sample alignment. In addition, a coherent interaction between polarization vectors across the grains was observed. However, the piezocoefficient (d33) measurements show that the oriented as well as polycrystalline film exhibits similar piezoresponse with an average value of ~25 pm/V.

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IITH Creators:
IITH CreatorsORCiD
Ramadurai, Ranjithttp://orcid.org/0000-0003-2991-0027
Item Type: Article
Uncontrolled Keywords: Pulsed laser ablation; Thin films; Lead free piezoelectrics; PFM; Ferroelectrics
Subjects: Materials Engineering > Materials engineering
Divisions: Department of Material Science Engineering
Depositing User: Team Library
Date Deposited: 02 May 2016 03:52
Last Modified: 20 Sep 2017 07:16
URI: http://raiith.iith.ac.in/id/eprint/2301
Publisher URL: https://doi.org/10.1016/j.matlet.2016.04.194
OA policy: http://www.sherpa.ac.uk/romeo/issn/0167-577X/
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