Determination of the superlattice structure factor by X-ray diffraction using a temperature gradient

Abstract

The influence of a temperature gradient directed perpendicular to the crystal surface on the diffraction focusing of a spherical X-ray wave in a superlattice is studied for the Laue geometry. It is shown that different satellites can be focused on the exit surface of the crystal by a smooth change in the gradient value, which can become the basis for the experimental determination of the structure factor of the superlattice.

Study of phase objects by dynamical diffraction of a spherical X-ray wave in a crystal using a temperature gradient

“…The use of a temperature gradient in the study of the dynamical diffraction of a spherical X-ray wave in the Laue geometry is due to the fact that the atomic reflecting planes in the crystal are fan-shaped, which makes it possible to control the focusing process. It was shown in [8] that in the case of a short period superlattice a smooth change in the gradient value can focus different satellites on the exit surface of the crystal, which makes it possible to determine their structure factors.…”