Reciprocal space mapping of epitaxial MgO films on SrTiO3

X-ray measurements of an epitaxial MgO film grown cube on cube on a SrTiO3 substrate are presented. Symmetric and asymmetric area maps have been combi ned to present a map of reciprocal space for a slice of the limiting sphere containing all h h l reflections visible by Cu K-alpha radiation. The asym metric reflections show that the MgO film has grown completely relaxed. For reflections near, but outside, the edge of the limiting sphere for Cu K-al pha radiation, additional symmetry information has been obtained by using C u K-beta radiation. (C) 1999 Elsevier Science B.V. All rights reserved.