Abstract
Abstract The laser Raman spectrum of ferroelectric triglycine sulfate has been determined by the use of an argon ion gas laser. The observed Raman lines are compared with reported assignments in the literature by Taurel1 and Krishnan2, Determination of depolarization ratio of the sulfate line at 980 cm−1 shows that the Raman band is highly polarizable and the molecular vibration is totally symmetrical v1. The role played by the glycine groups in the spontaneous polarization and its reversal can be indirectly confirmed by Raman spectrum of TGS. Interpretation of the Raman spectrum indicates that the SO4 groups do not have tetrahedral symmetry at roan temperature. Ferroelectric behavior of TGS is attributed to the glycine groups.
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