Nonlinear Dielectric Response of (1 – x)[0.7PbZrO3–0.3(K0.5Bi0.5)TiО3]–xSrTiO3 Solid Solutions

The nonlinear dielectric response (δε) of (1 – x)[0.7PbZrO3–0.3(K0.5Bi0.5)TiО3]–xSrTiO3 solid solution samples was studied in an electric bias field (E=) of 0–15 kV/cm in a temperature range of 200–550 K. It was found that the δε(T) dependences have an oscillating appearance, with alternating signs of δε. The shape of the δε(T) curves alters regularly depending on the concentration x. For a number of compositions, it was found that the maximum of the temperature dependence of the permittivity shifts in the low-temperature direction under the action of the bias field E=.