Peculiarities in Thermal Linear Expansion and Refractive Indices of (NH2CH2COOH) · H3PO3 Single Crystals in the Region of Phase Transition

Synthesis, growth, morphology and characterization of ferroelectric glycine phosphite single crystals

“…One such compound is glycine phosphite with chemical formula NH 3 CH 2 COO.H 3 PO 3 , identified as a good ferroelectric material [1][2][3][4][5]. Glycine phosphite undergoes a continuous paraelectric-ferroelectric phase transition at 225 K. Earlier reports confirm its very strong ferroelectric effects compared to the conventional organic materials and also its strong piezoelectric and pyroelectric properties [6][7][8][9][10]. It crystallizes in the monoclinic system with space group P2 1 /a.…”

Ultrasonic investigation of elastic properties and a phase transition in ferroelectric glycine phosphiteNH3CH2Deepthy1, Bhat2, Alex3 et al. 2000Phys. Rev. B220110View full textAdd to dashboardCite

“…The linear compressibility values are found to correlate well with those of the elastic constants along the a, b, and c directions. A recent report 19 on the thermal expansion ␣ of GPI in the paraelectric phase shows a relatively large coefficient of linear thermal expansion for the c axis and a comparatively low expansion along the b axis. The highest value of ␣ along the c axis once again corresponds to the weak hydrogen bonded direction, while the strong intermolecular forces along b direction substantiates its low value in this direction.…”

Structural and microhardness studies of pure and thiourea doped glycine phosphite single crystal

“…This familiar crystal has spontaneous polarization parallel to the monoclinic b -axis below the transition temperature. Glycine phosphite crystals have been grown and investigated by many researchers to explain the mechanism behind their growth, phase transition and thermal properties [7][8][9][10]. But no growth detail with the addition of dopant with GPI has been reported so far.…”