fig5

Figure 5. (A) and (B) measured dielectric real part ε_r and loss tanδ at several frequencies as a function of T for the as-prepared wet sample (f_w = 0.483) in the warming sequence from 200 K. For a clearer illustration, the measured ε_r(T) and tanδ(T) data at f = 10 kHz are presented in (C). (D) Evaluated T_maxvs. f relationship from which the thermal activation energy E_a is evaluated via the Arrhenius law.