నైరూప్య

Molecular Spectroscopic Studies OF TGS, TGSP and TGSZC Crystals

N.Kartheeswari, K.Viswanathan

TGS crystals are important ferroelectric materials. TGS plays a vital role in Infrared detector and FT-IR instrumentation and most widely used in Capacitors, RAM, Earth exploration monitoring, Pyroelectric vidicon tubes etc. In present work TGS, TGSP and TGSZC crystals are grown by slow evaporation method and then the grown crystals are subjected to UV, IR and Raman spectral studies. From UV – Vis spectral study optical transparency of the grown crystals is determined. From FT-IR and Raman spectral studies the presence of characteristic functional groups are confirmed. Powder XRD study is carried out to determine the crystal structure of grown crystals. Ferroelectric hysteresis study is carried out using homemade Sawyer-Tower circuit to investigate the ferroelectric behavior of grown crystals. Spontaneous polarization values were obtained. Electrical conductivity measurements are carried out for grown crystals. NLO property of grown crystals is tested using Kurtz-Perry powder technique.