Enhanced tunability and phase transition studies in compositionally varying lead magnesium niobate-lead titanate multilayered thin films

Ranjith, R and Laha, Apurba and Krupanidhi, SB (2005) Enhanced tunability and phase transition studies in compositionally varying lead magnesium niobate-lead titanate multilayered thin films. In: Applied Physics Letters, 86 . 092902/1-3.

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Abstract

Multilayers of (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 thin films were prepared with a compositional variation of PbTiO3 on each layer across the film by pulsed laser ablation technique. The fabricated films were found to possess an enhanced diffusiveness in the dielectric phase transition, which actually seemed to be an envelope of the phase transition of the individual layer relaxor ferroelectrics of a particular composition. They also showed a very high nonlinear dielectric response and hence a high tunability about 70%, an increase of about 40% than that observed for single layer composition. This increase in tunability has been attributed to the lattice strain and the artificially enhanced chemical heterogeneity of the system. These multilayer films also showed a slim hysteresis loop characteristic with a saturation and remnant polarization of 20 and 6 µC/cm2, respectively.

Item Type:	Journal Article
Publication:	Applied Physics Letters
Publisher:	American Institute of Physics
Additional Information:	Copyright for this article belongs to American Institute of Physics (AIP).
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	14 Mar 2005
Last Modified:	19 Sep 2010 04:18
URI:	http://eprints.iisc.ac.in/id/eprint/2760

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