Departmental Papers (MSE)

Document Type

Journal Article

Date of this Version

October 2008

Abstract

Tensile and compressive solid-solution thin films based on LaAlO3 and CaZrO3 compositions were grown on perovskite oxide substrates using pulsed laser deposition to study growth mode transitions and strain relaxation. A buried layer of SrRuO3 between the thin film and the SrTiO3 substrate was also introduced to provide an auxiliary embedded strain gauge, which helps identify the critical conditions for the onset of catastrophic strain relaxation events – cracking and dislocation cascades. The results are compared with theoretical predictions to provide guidelines on some general deposition conditions that may be used to obtain smooth, crystalline and defect-free thin films of interest to perovskite-based heterostructures.

Comments

Postprint version. Published in Acta Materialia, Volume 56, Issue 18, October 2008, pages 5312-5321.
Publisher URL: http://dx.doi.org/10.1016/j.actamat.2008.07.010

Keywords

dislocation, fracture, multilayer thin films, perovskites, laser deposition

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Date Posted: 13 October 2008

This document has been peer reviewed.