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Type of dissociated misfit dislocation in perovskite films on LaAlO3

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1 Author(s)
Lu, C.J. ; Department of Physics, Hubei University, Wuhan, Hubei 430062, People’s Republic of China

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A type of dissociated misfit dislocation in epitaxial Ba0.3Sr0.7TiO3 thin films on (001) LaAlO3 substrates has been studied by high-resolution transmission electron microscopy. The dislocation has a Burgers vector [210] and is dissociated into four partial dislocations with Burgers vectors of type 12<110>. All partials can relieve the localized misfit strain and they are interacted with three 12<110> stacking faults lying on (001). The partials were generated during island nucleation and mosaic growth of the BSTO film, while a small amount of excess TiO2 during film deposition favored the formation of the 12<110> stacking faults.

Published in:

Applied Physics Letters  (Volume:85 ,  Issue: 14 )

Date of Publication:

Oct 2004

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