Strain reduction in supported materials; the formation of cracks and dislocations

Sayle, D.C. (1999) Strain reduction in supported materials; the formation of cracks and dislocations. Journal of Materials Chemistry, 9 (2). pp. 607-616. ISSN 0959-9428. (doi:10.1039/a807377e) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:46827)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL: http://dx.doi.org/10.1039/a807377e

Abstract

Supported materials have been constructed by successively depositing ions onto a surface in conjunction with dynamics simulation and energy minimisation. In particular, the growth of SrO/SrO, CaO/SrO (-6.9% misfit) and BaO/SrO (+7.0% misfit) were studied as model systems to examine the influence of the misfit on the structure and stability of epitaxial thin films. At low (theoretical monolayer) coverage, the CaO formed islands on the SrO(001) surface in contrast to the strips formed by BaO. At higher coverages cracks-formed within the CaO, while dislocations appeared within the BaO thin film, in both cases to help reduce the strain within the materials. A mechanism for the formation of the dislocation is presented. For one particular CaO/SrO(001) interface, a cubic-hexagonal transformation of the CaO is observed, enabling the misfit to be perfectly accommodated.

Item Type:	Article
DOI/Identification number:	10.1039/a807377e
Uncontrolled keywords:	ion, strontium, article, chemical structure, film, materials testing, mathematical analysis, molecular dynamics, molecular interaction, simulation, structure analysis, surface property, synthesis
Subjects:	Q Science
Divisions:	Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User:	Dean Sayle
Date Deposited:	20 Mar 2015 15:59 UTC
Last Modified:	16 Nov 2021 10:19 UTC
Resource URI:	https://kar.kent.ac.uk/id/eprint/46827 (The current URI for this page, for reference purposes)

University of Kent Author Information

Sayle, D.C..

Creator's ORCID:	https://orcid.org/0000-0001-7227-9010
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