Fig. 3: RF relaxations in lead-substituted BaM.

Radiofrequency spectra of the real (a, b) and imaginary (c, d) parts of the dielectric permittivity of Ba_1−xPb_xFe₁₂O₁₉, x = 0.2, measured at different temperatures for polarization \(E \bot c\). Solid lines represent the results of least-square fitting with Eq. (4). The Roman numerals in circles denote the three relaxational processes clearly visible in this figure. The dashed lines are guides to the eye.