“…1, the polarization loops for PMN + Li ceramics are shown for frequencies of 0.1, 1, and 10 Hz at temperatures both above and below tempera ture Т m , which corresponds to a maximum of ε' (Т m ≈ -12°C at a frequency of 10 Hz [9]. It is obvious that the nonlinearity of the dielectric hysteresis loops is observed over a rather lengthy temperature range located above Т m .…”