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The study of the dielectric function and the pyroelectric coefficient of LiNbO3: Fe single crystals over a wide range of Fe concentrations and heat treatment reveals the presence of a low frequency relaxation process strictly associated to the variation of the pyroelectric currents in these materials. The investigation of these properties is very important in view of recent holographic storage applications of this kind of material.
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Barbosa et al. (1991) studied this question.
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