Determination of elastic constants and study of dielectric constant in tgs by brillouin scattering

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Abstract
The elastic constants of TGS are measured at room temperature. The study of the temperature dependence of shift and broadening of the Brillouin line which corresponds to a wave propagating along [0, 0, 1] gives information about the high frequency dielectric constant ε22(ω). A Debye type relaxation of the dielectric constant with a single relaxation time occurs.