Dielectric Constant and Dielectric Relaxation Time of Rochelle Salt

The dielectric constant of Rochelle salt was measured in the range from liquid helium temperature to room temperature. The result shows that the experimental values can be explained satisfactorily by Mitui's theory. On the contrary the theoretical values of dielectric relaxation time in the nonequilibrium state which can be obtained by extending Mitui's theory do not agree with the experimental ones which are derived from Sandy's data. This fact indicates that Eyring's reaction rate process assumed in the present treatment is inadequate to explain the dielectric relaxation process of Rochelle salt and the other relaxation mechanism such as the overdamped oscillation of tunneling proton should be considered or Mitui's theory should be modified to be consistent with Sandy's result.