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We report the fixing of a photorefractive grating in KTa(1-x)Nb(x)O(3). The procedure involves the writing of a photorefractive grating in the cubic phase and the cooling of the sample under an applied field into the rhombohedral phase. We discuss possible mechanisms responsible for the effect.

Fixing of a photorefractive grating in KTa_1−xNbxO_3 by cooling through the ferroelectric phase transition