Abstract
The dielectric response of sheep horn has been measured in the frequency range from 10(-3)-10(5)Hz and over temperatures in the range 304-500 K. The dynamic behaviour of the conductance and capacitance in sheep horn has been observed to follow fractional power law dependences on frequency. It is shown that the over all dielectric response of these dead cells correspond to a dispersive imperfect bulk in series with a dispersive barrier region. It is further shown that the increase in temperature influences the reponse by eliminating the room temperature de conductance and affecting the magnitude of the dispersion in capacitance. The magnitudes of activation energies are found as 0.33 +/- 0.02 eV for conductance, 0.40 +/- 0.02 eV for relaxation and 0.33 +/- 0.02 eV for the frequency shift.