Role of growth conditions and Bi-content on the properties of SrBi2Ta2O9 thin films

Bhattacharyya, S and James, AR and Krupanidhi, SB (1998) Role of growth conditions and Bi-content on the properties of SrBi2Ta2O9 thin films. In: Solid State Communications, 108 (10). pp. 759-763.

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Abstract

Ex-situ and in-situ crystallised films of SrBi2Ta2O9 (SBT) were grown using pulsed laser ablation. Different growth parameters were used for ablation. Both low temperature grown films, followed by annealing and high temperature grown ones were used for comparison. It was found that in-situ crystallised films showed better electrical properties over the annealed films, vis-ci-vis the hysteresis loops and dielectric constants. It was also observed that the Bi concentration (which was estimated by EDS analysis) had a marked influence on the ferroelectric properties. With stoichiometric or excess Bi content, growth of in-situ crystallised films resulted in the observation of square hysteresis loops with a P-r value of 10 mu C/cm(2) and a coercive field of 24 kV/cm, which appears very attractive for NVRAM applications.

Item Type:	Journal Article
Publication:	Solid State Communications
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	ferroelectrics;thin films;laser processing;dielectric response.
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	22 Dec 2009 11:54
Last Modified:	19 Sep 2010 05:27
URI:	http://eprints.iisc.ac.in/id/eprint/19148

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