Fig. 11

Frequency dependent (a) dielectric constant \(\:{\epsilon\:}^{{\prime\:}}\), (b) dielectric loss \(\:{\epsilon\:}^{{\prime\:}{\prime\:}}\), and (c) tanδ, and (d,e) \(\:{\epsilon\:}^{{\prime\:}}\) and \(\:{\epsilon\:}^{{\prime\:}{\prime\:}}\) values for Fe₂O₃ concentration dependent for Fe₂O₃/(PVA-PVP) films at 30^oC .