A Transmission Electron Microscopy Study of Dislocation Substructures in PLD-grown Epitaxial Films of (Ba,Sr)TiO3 on (001) LaAlO3
Keyword(s):
ABSTRACTEpitaxial Ba0.6Sr0.4TiO3 films were grown onto (001) LaAlO3 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.
2015 ◽
Vol 2015
(0)
◽
pp. _WeC-2-1-1-_WeC-2-1-3
2006 ◽
Vol 21
(7)
◽
pp. 1693-1699
◽
2002 ◽
Vol 82
(4)
◽
pp. 735-749
◽
1996 ◽
Vol 74
(2)
◽
pp. 57-66
◽