Abstract
Phonon transport in ferroelectric ceramics and single crystals has been experimentally investigated. Our measurements indicate that, in the temperature range 1.7–3.8 K studied, the effective phonon diffusion coefficient behaves as D eff∞T −5 in ferroelectrics with a broadened phase transition. This experimental dependence is in accord with the presence of a plateau in the thermal conductivity of such materials. The scattering by domain walls in BaTiO3 single crystals has been identified, and our results are in quantitative agreement with calculations.
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Zh. Éksp. Teor. Fiz. 115, 624–631 (February 1999)
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Ivanov, S.N., Taranov, A.V., Khazanov, E.N. et al. Propagation of nonequilibrium phonons in ferroelectric ceramics and single crystals. J. Exp. Theor. Phys. 88, 342–346 (1999). https://doi.org/10.1134/1.558802
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DOI: https://doi.org/10.1134/1.558802