Dielectric property in K2Fe(SO4)2

Heat capacity measurements have been made on K 2 Fe(SO 4 ) 2 · 2H 2 O, from 273 K to 420 K in a differential scanning calorimeter (DSC). Phase transition at 364 K was observed as a sharp peak in the heat capacity curve. The dielectric anomaly was corresponding to DSC observation at 364 K on heating from room temperature. The complex dielectric constant was measured various frequencies in a frequency range between 1 × 10 6 Hz and 1 × 10 8 Hz. The observed temperature and frequency dependence of the complex dielectric constant can be approximated in terms of single relaxation time τ(T) of the Debye type.