Interplay of local polarization, ionic size, and octahedral tilt in SrTiO3-Na0.5Bi0.5Ti O3

Sharma, D and Punetha, P and Das Adhikary, G and Avdeev, M and Ranjan, R (2024) Interplay of local polarization, ionic size, and octahedral tilt in SrTiO3-Na0.5Bi0.5Ti O3. In: Physical Review B, 109 (1).

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Abstract

We show that the ferroelectric system (1-x)SrTiO3-(x)Na0.5Bi0.5TiO3 exhibits an interesting interplay of local polarization, ionic size effect, and octahedral tilt. This interplay results in (i) a nonmonotonic composition dependence of the lattice volume at room temperature and (ii) existence of a unique temperature (300°C) at which the competing effects of electrostriction caused by the formation of polar nanoregions and geometrical ionic size make the system exhibit composition independent lattice parameters in a large composition interval x<0.40. © 2024 American Physical Society. AU.

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:	Strontium titanates, Competing effects; Composition dependence; Ferroelectric system; Ionic sizes; Local polarization; Na0.5Bi0.5TiO3; Nonmonotonic composition; Polar nanoregions; Sizes effect, Polarization
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	03 Mar 2024 10:26
Last Modified:	03 Mar 2024 10:26
URI:	https://eprints.iisc.ac.in/id/eprint/84188

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