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Strain Accommodation and Relaxation Mechanisms in Epitaxially Grown Manganites

Published online by Cambridge University Press:  17 March 2011

Marie-José Casanove ,
Pierre Baulès ,
Christian Roucau ,
David Magnoux ,
Jean-François Bobo ,
Manuel Bibes ,
Lluis Balcells  and
Josep Fontcuberta
Marie-José Casanove
Affiliation:
Centre d'Elaboration de Matériaux et d'Etudes Structurales, CNRS, B.P. 4347, F-31055 Toulouse cedex 4, France
Pierre Baulès
Affiliation:
Centre d'Elaboration de Matériaux et d'Etudes Structurales, CNRS, B.P. 4347, F-31055 Toulouse cedex 4, France
Christian Roucau
Affiliation:
Centre d'Elaboration de Matériaux et d'Etudes Structurales, CNRS, B.P. 4347, F-31055 Toulouse cedex 4, France
David Magnoux
Affiliation:
LaboratoiredePhysiquedelaMatièreCondensée, INSA, F-31077 Toulouse cedex 4, France
Jean-François Bobo
Affiliation:
LaboratoiredePhysiquedelaMatièreCondensée, INSA, F-31077 Toulouse cedex 4, France
Manuel Bibes
Affiliation:
Institut de Ciència de Materials de Barcelona, Campus UAB. 08193, Bellaterra, Catalunya, Spain
Lluis Balcells
Affiliation:
Institut de Ciència de Materials de Barcelona, Campus UAB. 08193, Bellaterra, Catalunya, Spain
Josep Fontcuberta
Affiliation:
Institut de Ciència de Materials de Barcelona, Campus UAB. 08193, Bellaterra, Catalunya, Spain
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Abstract

Epitaxial growth of La1-x(SrorCa)xMnO3 manganites (LSMO or LCMO) has been successfully achieved on SrTiO3 (001) and MgO(001) substrates. We report the influence of the deposition conditions, in particular growth rate, annealing and nature of the substrate, on the state of strain in the manganite layers. Fully strained layers are reported at very slow growth rate on SrTiO3 substrates while misfit dislocations are clearly observed in layers grown on MgO and alsoin layers grown on SrTiO3, after annealing at high temperature. Besides, evidence is given for a rhombohedral (respectively orthorhombic) distortion relaxation in LSMO (respectively LCMO) layers. The microstructure of the manganite layers is analyzed taking into account their non-isomorphic growth on the cubic substrates.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 696: Symposium N – Current Issues in Heteroepitaxial Growth--Stress Relaxation and Self Assembly , 2001 , N9.8
Copyright
Copyright © Materials Research Society 2002

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