DIELECTRIC-RELAXATION BEHAVIOR OF RS-ARS MIXED-CRYSTAL

We have studied the dielectric relaxation of Rochelle salt and ammoniu m Rochelle salt mixed crystal, NaK1-x(NH4)(x)C4H4O6.4H(2)O, for x = 0, 0.04, 0.09, 0.28, 0.34 and 0.40 in the frequency region from 50 MHz t o 10 GHz at temperature range between 170 K up to 290 K. It was found that the elementary process of the relaxation observed here depends on x. For x = 0.28, 0.34 and 0.40 the dipolar relaxation was found to be a thermally activated process. The distribution in relaxation times o bserved for x = 0.28, 0.34 and 0.40. This distribution could be explai ned by distribution in the activation energy.