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Rayleigh analysis of domain dynamics across temperature induced polymorphic phase transitions in lead-free piezoceramics (1-&ITx&IT)(BaTi0.88Sn0.12)-&ITx&IT(Ba0.7Ca0.3)TiO3

Abebe, Mulualem and Brajesh, Kumar and Malhotra, Jaskaran Singh and Ranjan, Rajeev (2018) Rayleigh analysis of domain dynamics across temperature induced polymorphic phase transitions in lead-free piezoceramics (1-&ITx&IT)(BaTi0.88Sn0.12)-&ITx&IT(Ba0.7Ca0.3)TiO3. In: JOURNAL OF PHYSICS D-APPLIED PHYSICS, 51 (18).

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Official URL: http://dx.doi.org/10.1088/1361-6463/aab75e

Abstract

We carried out a Rayleigh analysis of the dielectric permittivity of a lead-free piezoceramic system (1-x)(BaTi0.88Sn0.12)-x(Ba0.7Ca0.3)TiO3 across the composition and temperature induced polymorphic phase transformations to determine the trend in the reversible and irreversible domain wall motion across the composition and temperature induced structural changes. Experiments were carried out on three representative compositions x = 0.10, 0.2, and 0.25 exhibiting rhombohedral, orthorhombic, and tetragonal phases at room temperature. While confirming that the irreversible Rayleigh parameter is large in the orthorhombic phase, we discuss a correspondence between the reduction in the coercive field and the corresponding increase in the irreversible Rayleigh parameter. We also show how the proximity of the Curie point to the polymorphic phase boundary greatly undermines this correspondence.

Item Type: Journal Article
Additional Information: Copy right for this article belong to IOP PUBLISHING LTD, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 04 May 2018 18:50
Last Modified: 04 May 2018 18:50
URI: http://eprints.iisc.ac.in/id/eprint/59687

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