Misfit dislocation networks at {111}metal||{111}oxide interfaces were studied using high-resolution transmission electron microscopy. The experimental results were compared with image simulations of tentative atomic structures, as derived from lattice statics calculations. The calculations took account of 2-dimensional misfit at the interface. This was necessary in view of the high misfit and short repeat distances at the interfaces. The lattice statics calculations involved the use of simplified potentials across the interface. These reflected characteristics that had been revealed by experimental results and ab initio calculations. Trigonal networks of edge misfit locations, with a Burgers vector of 1/6<112> and a line direction of <110>, were deduced from the calculations. The misfit-dislocation networks had associated strain fields in the metal, which stretched out from the interface with approximately the repeat distance along the interface. These strain fields were evident in image simulations (along <110> and <112> directions) due to characteristic but subtle periodic changes in the contrast and brightness, as well as small displacements of the spots. Experimental images along <110> and <112> directions exhibited similar characteristics, but they were difficult to detect; especially along <112> in the case of the Cu/MnO interface. It was concluded that the proposed misfit-dislocation structure was nevertheless present at these interfaces.

High-Resolution Transmission Electron Microscopy Imaging of Misfit-Dislocation Networks at Cu/MgO and Cu/MnO Interfaces. H.B.Groen, B.J.Kooi, W.P.Vellinga, J.T.M.De Hosson: Philosophical Magazine A, 1999, 79[9], 2083-101