Effect of light impurities on the lattice dynamics of cryocrystals
M. I. Bagatskiı̆B. I. Verkin Physicotechnical Institute of Low Temperatures, Ukrainian Academy of Sciences, KharkovЕ. С. СыркинB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukrainian Academy of Sciences, KharkovС. Б. ФеодосьевB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukrainian Academy of Sciences, Kharkov
ABI
Abstract
The influence of a defect atom that is lighter than the matrix atom on the heat capacity of a crystal is studied theoretically and experimentally by considering the example of Ar solution in Kr. It is shown that the dynamic interaction for light impurities affects only the high-frequency region of the phonon spectrum and does not exert a noticeable influence on the thermodynamic characteristics at low temperatures up to very high concentrations of impurity atoms.
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