A frequency spectrum of the complex dielectric permittivity of soils is measured in the range of frequencies from 0.5 to 15.0 GHz in the course of frost penetration and thawing. The phase transitions taking place during frost penetration and thawing are analyzed within the concept of the generalized refractive mixing dielectric model (GRMDM). Two types of water concurrently present in the soil are identified: bound and free water. Temperature dependences of the Debye model parameters for each type of water are given, and parameters of a dielectric spectroscopic model of frozen and thawed soils are found. The hysteresis phenomenon during the phase transition of the soil moisture is investigated.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 9, pp. 24–28, September, 2008.
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Lukin, Y.I., Mironov, V.L. & Komarov, S.A. Investigation of dielectric spectra from moist soils during freezing-thawing processes. Russ Phys J 51, 907–911 (2008). https://doi.org/10.1007/s11182-009-9138-2
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DOI: https://doi.org/10.1007/s11182-009-9138-2