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Unraveling the nature of electric field- and stress- induced structural transformations in soft PZT by a new powder poling technique

Kalyani, Ajay Kumar and Lalitha, K and James, Ajit R and Fitch, Andy and Ranjan, Rajeev (2015) Unraveling the nature of electric field- and stress- induced structural transformations in soft PZT by a new powder poling technique. In: JOURNAL OF PHYSICS-CONDENSED MATTER, 27 (7).

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Official URL: http://dx.doi.org/ 10.1088/0953-8984/27/7/072201

Abstract

A `powder-poling' technique was developed to study electric field induced structural transformations in ferroelectrics exhibiting a morphotropic phase boundary (MPB). The technique was employed on soft PZT exhibiting a large longitudinal piezoelectric response (d(33) similar to 650 pCN(-1)). It was found that electric poling brings about a considerable degree of irreversible tetragonal to monoclinic transformation. The same transformation was achieved after subjecting the specimen to mechanical stress, which suggests an equivalence of stress and electric field with regard to the structural mechanism in MPB compositions. The electric field induced structural transformation was also found to be accompanied by a decrease in the spatial coherence of polarization.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the IOP PUBLISHING LTD, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Keywords: morphotropic phase boundary; PZT; crystal structure
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 01 Apr 2015 12:08
Last Modified: 01 Apr 2015 12:08
URI: http://eprints.iisc.ac.in/id/eprint/51128

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