Investigations on the preferential growth of 011 oriented triglycine sulphate single crystals and their response characteristics to high energetic ions particles

Abstract

The advancement in technology has created research activities on newlinethe development of high quality single crystals for device level application in newlinenew generation technology. The demand for high quality crystals focuses on newlinethe importance of rapid growth of single crystals. Single crystals with newlinesemiconducting, Ferroelectric, magnetic and favourable optical properties newlinefind their applications in optoelectronics devices, telecommunications, newlinemicroprocessors and as memory devices. In ferroelectric materials, the newlineapplication of an external field results in the change of state of polarization. newlineTri Glycine Sulphate (hereafter termed as TGS for brevity and newlineconvenience) is one such ferroelectric crystal and has a potential application newlinefor the infrared detection. This crystalline material also possesses high newlinepyroelectric co-efficient and exhibit low dielectric constant values. It has a newlinesecond order structural phase transition at the Cure temperature of 49°C. The newlinerectangular hysteresis displayed by ferroelectric Triglycine sulphate (TGS) newlinefamily of crystals makes them suitable for memory applications. newlineTGS crystal has also the disadvantages of depolarization even at the newlinelower fields and lower values of piezoelectric coupling constants. Earlier newlineefforts concentrated only towards improvement in the pyroelectric and newlineferroelectric properties of TGS with wide variety of dopants either on (010) newlineplanes or in as grown crystals owing to its potential application in infrared newline(IR) detectors. None of the study focussed on growth of TGS crystals at the newlineinterface directions between crystallographic b and c axes and as such newlinelt011gt plane oriented growth TGS crystal and their structure - physical newlineproperties correlationship with ferro, piezo and dielectric behaviour are of newlinespecial interests in this thesis work. Similarly, artificial creation of defect newlinestates in lt011gt TGS crystalline material after exposing them to high energetic newlineiv particles and heavier ions at different flux densities would also be the part of newlinethe subject matter of the present w