Preparation of Thiourea Doped Ferroelectric Glycine Phosphite Single Crystals

Abstract

An experimental procedure adopted to prepare the recent Ferroelectric Glycine Phosphite (GPI) single crystal is presented. As the crystal solubility in water depends on temperature, single crystals were grown from fine seed crystals in a saturated solution by employing the slow cooling technique. Transparent, colourless crystals with habit morphology weighing about 8 gm were obtained with in a month. The same procedure was used to grow single crystals with Thiourea doped GPI (TUGPI). Powder X-ray diffraction studies as well as FTIR studies were carried out on both the crystals. The results are discussed in detail.

Optical characterization of ferroelectric glycinium phosphite single crystals

“…A similar situation is observed in KDP family of crystals where the hydrogen bonds are perpendicular to the ferroelectric axis [17]. Glycine phosphite crystals were grown from solution and the mechanism behind their growth, phase transition, mechanical properties and doping effect has been explained [18][19][20]. Several macroscopic and microscopic properties of GPI and the effect of X-ray irradiation have been investigated by researchers [21,22], to elucidate the mechanism underlying the ferroelectric properties.…”