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X-Ray Reflection, A New Tool for Investigating Layered Structures and Interfaces

Published online by Cambridge University Press:  06 March 2019

Bruno Lengeler
Bruno Lengeler*
Affiliation:
Institut für Schicht- und lonentechnik Forschungszentrum Jülich GmbH Postfach 1913 D-5170 Jülich
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Abstract

At grazing incidence all X-ray techniques become surface sensitive. Far below the angle of total reflection the X-rays penetrate only 20 to 70 Å into condensed matter. X-ray reflectivity measurements give the density and the thickness of layers on substrates and the roughness of external and internal interfaces. The diffuse scattering in the vicinity of the specular reflection gives, besides the interface roughness, also the height-height correlation of the surface. From the angular dependence of the fluorescence intensity, emitted as a consequence of X-ray absorption, the depth profile of the absorbing species can be deduced. Artificial periodic multilayers give rise to Bragg reflexes and to standing X-ray wave fields, the angular dependence of which give the distribution of atomic species in the periodic stack. A number of examples illustrate the possibilities of the technique.

Type
III. Thin-Film and Surface Characterization by XRD
Information
Advances in X-Ray Analysis , Volume 35 , Issue A: First Pacific-International Congress on X-ray Analytical Methods (PICXAM). Fortieth Annual Conference on Applications of X-ray Analysis, August 7-16, 1991 , 1991 , pp. 127 - 135
Copyright
Copyright © International Centre for Diffraction Data 1991

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