We have observed the dielectric response of SBN−75+0.01 at.% Cr single crystal in the area of the diffuse phase transition. The effect of illumination and exposure (ageing) on the character of ε'(E₌) has been displayed. We show that the memory effects typical of the relaxors disappear almost completely under illumination of SBN−75+0.01 at.% Cr single crystal.

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