%0 Conference Paper
%K Thin films
%K Transmission electron microscopy
%K Film growth
%K Lanthanum compounds
%K Epitaxial growth
%K Ferroelectric films
%K Molecular dynamics
%K Thermal effects
%K Barium compounds
%K Mathematical models
%K Burgers vectors
%K Dislocation microstructures
%A I.B Misirlioglu
%A A.L Vasiliev
%A M Aindow
%A Ramamoorthy Ramesh
%A S.P Alpay
%A Hoffmann-Eifert S
%A Funakubo H
%A Joshi V V
%A Kingon A.I
%A Koutsaroff I.P
%B Materials Research Society Symposium - Proceedings
%D 2003
%G eng
%P 49-54
%T A transmission electron microscopy study of dislocation substructures in PLD-grown epitaxial films of (Ba,Sr)TiO 3 on (001) LaAlO 3
%V 784
%X <p>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.</p>