Research Article
Dielectric Properties of Rhombohedral
Table 4
Calculated activation energy in different temperature ranges, using the empirical formula = exp/) = /, where is the activation energy, = eV· (Boltzmann constant), (relative permittivity in vacuum) = F·, is the real part of dielectric constant for high frequency and is the time constant of the CR equivalent circuit, also called the relaxation time constant.
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