Abstract
LiNbO 3 single crystals with a composition close to stoichiometry ([Li]/[Li+Nb]=0.496) were grown by Czochralski method with K 2O flux for the domain reversal characteristics investigation. The switching field for the domain reversal in the near-stoichiometric crystal was 8.0±0.5 kV/mm, which is about one-third of the switching field required for the congruent LiNbO 3 crystals. The resulted long switching time enabled us to observe, for the first time, clear domain growth process in near-stoichiometric LiNbO 3 crystals. Slow growth is also found of both the needle-shaped nuclei into larger domains on the existing domain wall and along the electrode fingers.
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