A flux
growth technique for synthesizing FeBO3 single crystals
of high structural perfection was developed. The high structural quality
of the synthesized FeBO3 crystals was confirmed by means
of double-crystal X-ray diffraction analysis both in Laue and Bragg
geometries. The diffraction rocking curves taken locally and integrally
over the surface are in excellent agreement with the calculated curves.
Some macrodefects were revealed by X-ray topography in the crystal
volume. However, the local defects do not prevent the use of defect-free
regions of the crystal for synchrotron Mössbauer experiments.
Time-resolved technique of X-ray diffraction curve measurement was implemented at a laboratory X-ray source using a high-speed data acquisition system. The time resolution of up to 100 µs was achieved via this X-ray diffractometry technique in the experiment of rocking curve dynamics measurement in a piezoelectric lanthanum-gallium silicate crystal under the influence of high voltage periodic pulsed electric field with an amplitude of 3.08 kV/mm corresponding to the pre-breakdown state. This perturbation caused a quick angular shift of the rocking curve caused by crystal lattice deformation due to the piezoelectric effect. The absence of the diffraction curve broadening effect was shown as well as the absence of the other significant relaxation-like variations of the curve parameters which are inherent for the migration of charge carriers (ions or vacancies) under the external electric field.
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