The microstructural characteristics of misfit dislocations at the interface between La0.9Sr0.1MnO3 films and vicinal SrTiO3 substrates were studied by using transmission electron microscopy. The misfit dislocations were determined to be of edge-type, with a Burgers vector of a<100>. Due to the inclination of the substrate, the dislocation line along the miscut direction of the substrate was rotated. The deviation angle of the dislocation line away from the miscut direction of the substrate varied with the miscut angle. As a result, the dislocation arrays at the interface formed a parallelogram dislocation network rather than an orthogonal network. A simple explanation of the misfit dislocation reaction with steps, for a film on a vicinal substrate, was proposed in order to interpret the rotation of the dislocation line along the miscut direction.

Misfit Dislocation Arrays at the Interface between La0.9Sr0.1MnO3 Films and Vicinal SrTiO3(001) Substrates. M.J.Zhuo, Y.L.Zhu, X.L.Ma: Philosophical Magazine Letters, 2006, 86[8], 469-78