Abstract
The effect of gamma irradiation from a 60Co source at a dose D = 4.75 × 104 R on the dielectric properties of a Sr0.75Ba0.25Nb2O6 (SBN-75) single crystal with a smeared phase transition is investigated in the low-and infralow-frequency ranges. The behavior of the dielectric response is compared with the behavior of the depolarization currents induced in unirradiated and irradiated samples of the Sr0.75Ba0.25Nb2O6 compound. The observed changes in the electrical properties of the Sr0.75Ba0.25Nb2O6 single crystal in the temperature range of the smeared phase transition are associated with the stabilization of the ferroelectric phase of the material in an internal bias field generated by radiation-induced defects.
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