Nyquist plot ofZ* (a), Nyquist plot ofM* (b), and Bode plot ofZ″ andM″ (c), for the equivalent circuit in Fig. 11(R₁= 1 × 10⁸ Ω,R₂= 1 × 10⁶Ω,C₁=C₂= 1 × 10^–12 F).