Field dependent temperature shift of dielectric losses peak in TGS

Dielectric constant and loss factor measurements have been performed in triglycine sulfate single crystals at the vicinity of the Curie temperature (T_c≈48.5°C) as a function of ac driving field (20≤v≤10⁶ Hz) in a wide range of field amplitude (50≥E_o≥0.15V/cm). Well defined shifts of loss factor peak (D_max), increasing monotonously with the field, not previously reported as far as we know, were observed and analyzed in terms of the energy dissipated within the vanishing hysteresis loops at T≈T_c corresponding to E_o≈E_c(T), coercive field.