Abstract
The dielectric loss and the power absorption band of a dielectric is reproduced using the inertial effects in the Budó's model for the dielectric relaxation of polar molecules. An incomplete description of the dielectric spectrum and an arbitrary frequency separation between the dielectric loss and the power absorption resonance peak is shown to be due to an inadequate representation of the diffusional mechanism by the one particle model. In the present model the central dipole librates around a direction antiparallel to the fluctuating dipole. The latter is generated by the surrounding molecules. The model provides a quite favourable comparison with the experimental results. Measurements of dielectric loss for the diluted solutions of acetone in cyclohexane are made in the frequency range 2–300 GHz and the power absorption coefficient is measured in the frequency range 0.6–6 THz for the same solutions. The dependence of the frequency of maximum power absorption of a polar liquid on temperature and also on its concentration are explained in terms of the model.
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Marchesoni, F., Vij, J.K. & Coffey, W.T. Nonlinear Budó model for dielectric relaxation: Comparison with new experimental data. Z. Physik B - Condensed Matter 61, 357–366 (1985). https://doi.org/10.1007/BF01317804
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DOI: https://doi.org/10.1007/BF01317804