Abstract
The specific features of the transport of thermal-frequency phonons at liquid-helium (He) temperatures under the conditions of non-stationary measurements and thermal conductivity in polycrystalline Y3Al5O12 (YAG) ceramic samples, synthesized in different technological regimes, have been studied. The relationship between the phonon diffusion coefficient and the structural features of grains (crystallites) and grain boundaries has been revealed by analyzing the non-stationary measurement data and the thermal conductivity.
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Khazanov, E.N., Taranov, A.V. Diffusion of Phonons in Polycrystalline YAG Ceramic Samples at Liquid-Helium Temperatures, According to the Stationary and Non-Stationary Measurement Data. Crystallogr. Rep. 67, 1252–1258 (2022). https://doi.org/10.1134/S1063774522070434
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DOI: https://doi.org/10.1134/S1063774522070434