Abstract
MgO-doped LiNbO3 (MgLN) crystal has been produced using the Czochralski method. The domain reversal characteristics of the MgO-doped LiNbO3 single crystals with different Mg doping levels have been investigated, and the switching field is found to decrease with the increasing of Mg concentration. The switching field for the domain reversal in the MgLN crystal doped with 6.5 mol % MgO was ∼4.6kV∕mm. This is about one-fifth of the switching field for the congruent crystal. The resistance of the poling MgLN crystals as a function of Mg concentration was measured, and the influence of doping Mg on domain reversion for Mg-doped LiNbO3 is discussed, and explain the physical mechanism of the polarization switching of the MgLN crystals.
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