Preponderant influence of disordered P4bm phase on the piezoelectricity of critical compositions of Na0.5Bi0.5TiO3 -based ferroelectrics

Das Adhikary, G and Sharma, D and Punetha, P and Jafo, G and Abebe, G and Mishra, A and Senyshyn, A and Ranjan, R (2021) Preponderant influence of disordered P4bm phase on the piezoelectricity of critical compositions of Na0.5Bi0.5TiO3 -based ferroelectrics. In: Physical Review B, 104 (18).

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Abstract

We investigated the phase boundaries of three Na0.5Bi0.5TiO3-(NBT) based piezoelectric systems NBT-BaTiO3 (NBT-BT), NBT-K0.5Bi0.5TiO3 (NBT-KBT) and NBT-SrTiO3 (NBT-ST), all exhibiting similar piezoelectric responses (d33�180pC/N). We found that, apart from a qualitative difference (NBT-KBT/NBT-BT exhibits R3c-P4mm interferroelectric instability and NBT-ST does not), the critical compositions of all the three systems exhibit onset of a disordered P4bm phase. Our study suggests that the preponderant effect of this distortion overrides the interferroelectric instability, limiting the piezoelectric response of NBT-BT/NBT-KBT like that in NBT-ST. © 2021 American Physical Society.

Item Type:	Journal Article
Publication:	Physical Review B
Publisher:	American Physical Society
Additional Information:	The copyright for this article belongs to American Physical Society
Keywords:	Crystallography; Interferometry; Piezoelectricity; Strontium titanates, Critical composition; Na0.5Bi0.5TiO3; Piezoelectric response; Piezoelectric system; Preponderant effect; Qualitative differences, Barium titanate
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	03 Dec 2021 08:47
Last Modified:	03 Dec 2021 08:47
URI:	http://eprints.iisc.ac.in/id/eprint/70616

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