Brillouin scattering in SA and SB phases of butyloxy-benzilidene octylaniline

Abstract
The anisotropy of the quasilongitudinal sound waves in the SA and SB phases of n-butyloxy-benzilidene n-octylaniline was measured. From the data, three elastic constants were determined. A propagating shear wave was not observed in spite of a relatively large value of the relevant elastic constant