Figure 2: Permittivity ε´(ω) of a concentric shelled spherical particle suspension as a function of the frequency for localized surface charge distributions γ1=γ2=1 × 10-9. The dielectric phase parameters are: Φ=0.10, ε0=80, σ0=0.0001 mho/m; ε1=20, σ1=106 mho/m; ε2=10, σ2=1 × 107 mho/m. The charge diffusion coefficients are varied from D1 = D2=10-10, 10-9, 10-8, 10-7 and 10-6 m2/s, (marked in the increasing order by the arrow). The sphere is modeled with R1=10-6 m, R2=0.5 × 10-6 m. The inset shows the electrical conductivity σ(ω) as a function of frequency, for the same set of values of the parameters. The numbers represent SI units.