A combination of high-resolution X-ray diffractometry and diffraction imaging techniques applied to the study of MOVPE-grown CdxHg1−xTe/CdTe on GaAs
1991
Abstract We have applied a range of high-resolution X-ray diffractometry and diffraction imaging techniques to study the structural properties of Cd x Hg 1- x Te (CMT) grown epitaxially on GaAs by MOVPE. In this paper we specifically describe three such techniques and evaluate and compare the results from each. Automated double crystal diffractometry with a mapping facility provides information on the quality and uniformity of the layers. 004 rocking curve widths vary from A number of layers with varying degrees of structural quality have been examined using a combination of the above techniques. Recent results are reported illustrating the value of each technique and we demonstrate how the application of a combination of X-ray diffraction techniques can be a powerful tool for investigating the nature of structural defects in this highly mismatched heteroepitaxial system.
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