The interaction of lattice-matched heterostructures, grown by means of molecular beam epitaxy, was studied by using electron microscopy. An appreciable amount of interdiffusion was observed at temperatures as low as 700C. The use of X-ray micro-analysis revealed that interdiffusion occurred along a non-linear (non lattice-matched) path.

R.E.Mallard, N.J.Long, G.R.Booker, E.G.Scott, M.Hockly, M.Taylor: Journal of Applied Physics, 1991, 70[1], 182-92