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Phonon Scattering by Paramagnetic Ions of Europium and Samarium in Bismuth Ferrite

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Abstract

Temperature dependences of the thermal diffusivity and thermal conductivity in multiferroic materials BiFeO3, Bi0.90Sm0.10FeO3, and Bi0.90Eu0.10FeO3 were studied. Substitution of rare-earth ions of europium and samarium for bismuth ions in bismuth ferrite was found to decrease the phonon thermal conductivity in a wide temperature range. The decrease in the heat conductivity of bismuth ferrite was determined to result from resonance phonon scattering by paramagnetic ions of europium and samarium.

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Correspondence to S. N. Kallaev.

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Translated by S. Efimov

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Mitarov, R.G., Kallaev, S.N., Bakmaev, A.M. et al. Phonon Scattering by Paramagnetic Ions of Europium and Samarium in Bismuth Ferrite. Phys. Solid State 62, 1285–1288 (2020). https://doi.org/10.1134/S1063783420070173

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  • DOI: https://doi.org/10.1134/S1063783420070173

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