TITLE

Threading dislocation generation in epitaxial (Ba,Sr) TiO[sub 3] films grown on (001) LaAlO[sub 3] by pulsed laser deposition

AUTHOR(S)
Misirlioglu, I. B.; Vasiliev, A. L.; Aindow, M.; Alpay, S. P.; Ramesh, R.
PUB. DATE
March 2004
SOURCE
Applied Physics Letters;3/8/2004, Vol. 84 Issue 10, p1742
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Epitaxial Ba[sub 0.6]Sr[sub 0.4]TiO[sub 3] films were grown onto (001) LaAlO[sub 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. A high density of threading dislocations was present the films and these also had b=a<100>. The data indicate that the 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. © 2004 American Institute of Physics.
ACCESSION #
12405702

 

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