Uniaxial relaxors

Given that there had been questions about the validity of Equation (15.8), Tsurumi et al. [36] analyzed their pmn dielectric dispersion data in terms of a theory due to Ngai and White [37], The starting point for this theory is the universal dielectric function 

When explaining the unusual rl behavior, again the appearance of fluctuating polar precursor clusters at temperatures T Tc has to be considered as the primary signature of the polar rfim [2,3,6], Acting as precursors of the spontaneous polarization, which occurs below 

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