Dielectric Relaxation (Havriliak-Negami Function)

𝛥𝜖 = Strength of dielectric process

𝜖∞ = Dielectric constant at high frequency

𝜏HN= Havriliak-Negami relaxation time

𝛼   = Symmetric broadening parameter (0 < 𝛼 ≤ 1)

𝛽   = Asymmetric broadening parameter (0 < 𝛼 ≤ 1)

𝜎  = dc-conductivity

𝜔  = Angular frequency (𝜔=2𝜋 f)