Abstract
In an earlier X-ray investigation of ferroelectric single crystals of LiNbO3:Fe and triglycine sulfate (3C2H5NO2. H2SO4) subjected to laser irradiation [Zhukov, Fetisov & Aslanov (1991). J. Appl. Cryst. 24, 74–76], a large increase (greater than 20%) in the integrated intensities of Bragg reflections was found. An attempt to explain the observed effects is given here with the aid of additional experimental results and consideration of the abnormal photovoltaic effect (APE) followed by a deformation of the domain structure of the crystal.
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