Surface oscillations in the crystals AIO3, LiNbO3, and Y3Fe5O12
Yakovlev V.A., Zhizhin G.N.
The method of disturbed total internal reflection was used to observe surface oscillations in the spectrum region 600-900 cm-1 corresponding to the strong reflection bands of sapphire, lithium niobate, and yttrium iron garnet crystals. The dependence of their frequency on the wave vector is traced.