Enhanced thermal stability of dielectric, energy storage, and discharge efficiency in a structurally frustrated piezoelectric system: Erbium modified Na0.5Bi0.5TiO3-BaTiO3

Khatua, Dipak Kumar and Agarwal, Abhishek and Mishra, Anupam and Das Adhikary, Gobinda and Senyshyn, Anatoliy and Ranjan, Rajeev (2018) Enhanced thermal stability of dielectric, energy storage, and discharge efficiency in a structurally frustrated piezoelectric system: Erbium modified Na0.5Bi0.5TiO3-BaTiO3. In: JOURNAL OF APPLIED PHYSICS, 124 (10).

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Abstract

We have systematically investigated the effect of rare earth erbium (Er3+) substitution on the structural, ferroelectric, piezoelectric, and dielectric behaviour of the morphotropic phase boundary lead-free piezoelectric 0.94Na(0.5)Bi(0.5)TiO(3)-BaTiO3(NBT-6BT). We found that the system shows very good thermal stability of energy density, discharge efficiency, and dielectric permittivity. Detailed structural studies confirmed that Er modification induces a great deal of structural frustration which causes the system to thermally evolve towards the paraelectric state in a very sluggish manner. Our results seem to suggest that, among other factors, this sluggish temperature variation of the structural distortion is an important factor which imparts thermal stability to the energy storage and dielectric properties. Published by AIP Publishing.

Item Type:	Journal Article
Publication:	JOURNAL OF APPLIED PHYSICS
Publisher:	AMER INST PHYSICS
Additional Information:	Copy right for this article belong to AMER INST PHYSICS
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	04 Oct 2018 14:46
Last Modified:	04 Oct 2018 14:46
URI:	http://eprints.iisc.ac.in/id/eprint/60802

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