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Pyroelectric,piezoelectric, and polarization responses of glycine phosphite crystals with an admixture of glycine phosphate
Authors:V. V. Lemanov  S. G. Shul’man  V. K. Yarmarkin  S. N. Popov  G. A. Pankova
Affiliation:(1) Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia;(2) Institute of Macromolecular Compounds, Russian Academy of Sciences, Bol’shoi proezd 31, St. Petersburg, 119034, Russia
Abstract:Temperature dependences of the pyroelectric, piezoelectric, and polarization responses of glycine phosphite crystals containing different amounts of glycine phosphate were studied in the range 120–320 K. The experimental data obtained suggest the presence of a built-in bias field oriented along the twofold symmetry axis in these crystals. This field was found to be 5 kV/cm. It is suggested that the built-in bias plays a decisive role in the formation of the pyroelectric and piezoelectric crystal responses in the temperature interval 225–280 K, which is significantly higher than the ferroelectric phase transition point in nominally pure glycine phosphite crystals (224 K).
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