Abstract
The influence of γ-irradiation on the dielectric properties of the relaxors of PLZT system (in the range low (LF) - and infralow frequency (ILF)) were investigated. The phenomenon discovered in this work are confirming the point of view which had been early that the different of the phase state of these materials at the process of irradiation is principal cause of the different of the dielectric response of the irradiated PLZT system with the large concentrations of La and the system with the average concentrations of La.