Download (4Mb) - Etheses - Saurashtra University

Chapter V Dielectric Study of ……
-
Conclusion
1. The dielectric constant of pure and amino acids doped KDP crystals
decreased as the frequency of applied field increased and ultimately
became constant at high frequency. This might be due to the dipoles
could not comply with the rapid changes in the alternating electric field.
2. At any range of frequency the dielectric constant of the doped KDP
crystals was found to be lower than those for pure KDP crystals, which
might be due to generation of L-defects on addition of amino acids.
3. As the doping of amino acids increased the dielectric loss of KDP
crystals decreased. The nature of the variation of dielectric loss with
frequency was similar to that of the dielectric constant with frequency.
The low values of dielectric loss in doped crystals indicated that the
doping of amino acids did not bring major defects.
4. The variation of a.c. resistivity with frequency of applied field suggested
that the resistivity decreased with increasing the frequency and its
value increased on increasing the amount of amino acids doping.
218