Electrical Properties and DC Conductivity of Phosphoric Acid Doped TGS Single Crystals

Autor:	Vinay Gupta, K. Sreenivas, V. Gulia, Aparna Saxena
Rok vydání:	2005
Předmět:	Permittivity Materials science Doping Analytical chemistry Crystal structure Dielectric Atmospheric temperature range Condensed Matter Physics Triglycine sulfate Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Electrical resistivity and conductivity Phosphoric acid
Zdroj:	Ferroelectrics. 323:145-149
ISSN:	1563-5112 0015-0193
DOI:	10.1080/00150190500309098
Popis:	Properties of phosphoric acid (H3PO4) doped triglycine sulfate (TGSP) grown from aqueous solutions containing 0.1 to 0.5 moles of H3PO4 have been investigated. Composition analysis indicates a very low incorporation of phosphoric acid in the crystal lattice. Large sized crystals of dimension (70 mm × 40 mm × 25 mm) suitable for IR detector are obtained with 0.2 moles of H3PO4 in solution. The presence of both zwitter and glycinium ions in TGSP is explained through FT-IR analysis. The dielectric dispersion of TGSP crystals in the frequency range from 100 Hz to 100 KHz, and in the temperature range 27 to 65°C has been analyzed. The increased dielectric dispersion in TGSP crystals is found to be related to the increase in dc conductivity, and the increased domain boundary relaxation time. Doped crystals show a broad transition and suppressed value of peak dielectric constant.
Databáze:	OpenAIRE
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