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Chapter V Dielectric Study of ……
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It has also been found that the value of dielectric constant decreases as the
amount of doping of L-histidine increases.
Dielectric Constant
55
50
45
40
35
30
25
2.0 2.5 3.0 3.5 4.0 4.5 5.0
213
Pure KDP
KDP + 0.3 wt.% L-histidine
KDP + 0.4 wt.% L-histidine
KDP + 0.5 wt.% L-histidine
Log F
Figure: 5.8 Plots of Dielectric constant versus frequency of applied field for pure and L-
histidine doped KDP crystals.
Figure (5.9) and (5.10) show the plots of variation of dielectric constant
with frequency for L-threonine doped KDP crystals and DL-methionine doped
KDP crystals, respectively. These figures show the similar nature as depicted
by figure (5.8) for pure and L-histidine doped KDP crystals.
Dielectric Constant
55
50
45
40
35
30
25
Pure KDP
KDP + 0.3 Wt. % L-threonine
KDP + 0.4 Wt. % L-threonine
KDP + 0.5 Wt. % L-threonine
20
2.0 2.5 3.0 3.5 4.0 4.5 5.0
Log F
Figure: 5.9 Plots of Dielectric constant versus frequency of applied field for pure and L-
threonine doped KDP crystals.