Acoustic Energy Flow in High Symmetry Crystals.
NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
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The determination of elastic properties of crystals by sound velocity measurements is facilitated by use of a perturbation solution to the equations of motion for sound waves propagating in the crystals. Transformation equations can relate the solution for arbitrary propagation direction to an established crystal coordinate system. A method of calculating the acoustic components of the energy flow vector is developed for several high symmetry crystal classes. The validity of this method is herein confirmed and results are presented which are consistent with experimental data. A modern desk calculator was employed to determine solutions for hexagonal, cubic and tetragonal crystals. Author
- Solid State Physics