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Probing the Dead Layer in Barium Strontium Titanate Capacitors Made by Pulsed Laser Deposition

Published online by Cambridge University Press:  17 March 2011

L. J. Sinnamon ,
R. M. Bowman  and
J. M. Gregg
L. J. Sinnamon
Affiliation:
Department of Pure and Applied Physics The Queen's University of Belfast Belfast BT7 1NN, U. K
R. M. Bowman
Affiliation:
Department of Pure and Applied Physics The Queen's University of Belfast Belfast BT7 1NN, U. K
J. M. Gregg
Affiliation:
Department of Pure and Applied Physics The Queen's University of Belfast Belfast BT7 1NN, U. K
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Abstract

Thin film capacitors with structures Au/Ba0.5Sr0.5TiO3/SrRuO3 were fabricated by pulsed laser deposition onto {001}-oriented MgO single crystal substrates. As part of an overall programme to investigate the so-called ‘dead-layer’ effect, polarisation loops were taken from the capacitors and analysed as a function of BST film thickness. Analysis was done within a Landau-Ginzburg-Devonshire (LGD) framework, and showed that for film thickness greater than ∼100nm, changes in the dielectric behaviour of the BST were dominated more by epitaxial mismatch strain, than by the conventional notion of the dead-layer.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 688: Symposium C – Ferroelectric Thin Films X , 2001 , C13.6.1
Copyright
Copyright © Materials Research Society 2002

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