ABSTRACT
The diffuse scattering from misfit dislocations in high resolution double and triple axis X-ray scattering experiments is discussed. Analysis of the distribution of this diffuse scatter in reciprocal space provides a more sensitive method for the detection of the onset of relaxation than measurement of the half width of the Bragg peak. X-ray topography provides an even more sensitive method for the identification of the thickness at which relaxation begins to occur and Burgers vector analysis is possible except in very thin layers. A capping layer can result in complex interference contrast in the image, which has been observed experimentally and simulated by numerical solution of Takagi’s equations.
