| Abstract: | A photoelastic method for evaluation of components of acoustic gyrotropy preudotensors from acoustic-gyrotropy-induced changes
in diffraction curves in elastograms of light diffraction on ultrasound waves propagating along acoustic axes in symmetry
planes of elastic properties is developed. It is found that in m, 3m, 2mm, 4mm, and 6mm planal class and
and
inversion class crystals acoustic gyrotropy does not manifest itself in parameters of waves propagating in symmetry planes.
It is shown that 222 class crystals and crystals of six other higher symmetry classes may have a sufficient number of acoustic
axes in coordinate planes to ensure evaluation of all components of gyrotropy tensors by the photoelastic method. It is ensure
out that evaluation of components of the inherent gyrotropy pseudotensor in 6/m or 4/m class crystals makes it possible to
verify the validity of symmetry conditions, due to which only 15 components are left in this tensor in the general case.
B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68, F. Skorina Ave., Minsk, 220072, Belarus.
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 66, No. 1, pp. 78–83, January–February, 1999. |
