Abstract
This paper reports on the results of measurements of the internal friction Q −1 and the shear modulus G of Li2B4O7 single crystals along the crystallographic directions [100] and [001] in the temperature range 300–550 K for strain amplitudes of (2–10)×10−5 at infralow frequencies. The anomalies observed in Q −1 and G in the temperature range 390–410 K are due to thermal activation of the mobility of lithium cations and their migration from one energetically equivalent position to another. A jump in the internal friction background is revealed in the vicinity of the Q −1 and G anomalies for the Li2B4O7 crystal. The magnitude of this jump depends on the crystallographic direction.
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Translated from Fizika Tverdogo Tela, Vol. 45, No. 1, 2003, pp. 80–83.
Original Russian Text Copyright © 2003 by Bilanych, Ba\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \)sa, V. Rizak, I. Rizak, Holovey.
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Bilanych, V.S., Baisa, N.D., Rizak, V.M. et al. Internal friction of Li2B4O7 single crystals. Phys. Solid State 45, 82–86 (2003). https://doi.org/10.1134/1.1537415
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DOI: https://doi.org/10.1134/1.1537415