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A transmission electron microscopy study of dislocation substructures in PLD-grown epitaxial films of (Ba,Sr)TiO 3 on (001) LaAlO 3

Publication Type

Conference Paper

Authors

Misirlioglu, I.B., A.L. Vasiliev, M. Aindow, Ramamoorthy Ramesh, S.P. Alpay, Hoffmann-Eifert S., Funakubo H, Joshi V, Kingon A.I., Koutsaroff I.P.

Abstract

Epitaxial Ba 0.6Sr 0.4TiO 3 films were grown onto (001) LaAlO 3 by pulsed-laser deposition, and the dislocation structures of the films were investigated using transmission electron microscopy. Misfit dislocations with a periodicity of about 7 nm and Burgers vectors b = a〈100〉 were observed at the interface. High densities of threading dislocations was present in the films with Burgers vector b = a〈100〉. The observations reveal that threading dislocations are not generated as the result of half-loop climb from the deposit surface as proposed previously, but are instead formed when misfit dislocations are forced away from the interface during island coalescence.

Journal

Materials Research Society Symposium - Proceedings

Volume

784

Year of Publication

2003

ISSN

02729172

Notes

cited By 0

Research Areas

Ramesh Lab