Sound velocity in single crystals of synthetic opals |
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| Authors: | V N Bogomolov I A Smirnov N V Sharenkova G Bruls |
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| Institution: | 1. Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia
2. Goethe Universit?t, Frankfurt a. M., 60054, Germany
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| Abstract: | The 111] longitudinal sound velocity (v L) in a single-crystal synthetic opal has been measured at a frequency of 10 MHz in the temperature range 4.2–300 K. At 300 K, v L=2.1×105 cm/s. The quantity dv L/v 300 K(T) (where v T,K?v300 K) in the ranges 4.2–200 and 200–300 K behaves in the way typical of amorphous and crystalline solids, respectively. |
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