抄録
Dielectric anomalies were observed in ammonium sulfate [(NH4)2SO4] crystals at T0≅ 413K after the crystal was heated above 413K. Frequency dependence of dielectric loss across T0≅ 413K observed in the 2nd heating-up cycle could be best fitted by two overlapping relaxation functions of the Cole-Cole type. The fast component in higher frequency region depicts a sharp discontinuity of relaxation frequency at T0≅ 413K while the slow component in lower frequency region shows a continuous slowing down to zero relaxation frequency as temperature increased to T0≅ 413K.
