Dielectric Study on the Phase Transitions in Triglycine Selenate-Deuterated Triglycine Selenate System

概要

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Ferroelectric phase transitions in the solid solution of triglycine selenate (NH2CH2COOH)3$\cdot$H2SeO4 (TGSe) and deuterated triglycine selenate (ND2CH2COOD)3$\cdot$D2SeO4 (DTGSe) were studied by means of dielectric-constant measurements. The Curie point monotonically increases with increasing deuterium content from 22.3°C for TGSe to 35°C for DTGSe. The deuterium-substitution induces a discontinuous change in dielectric constant at the transition accompanied with a thermal hysteresis of the Curie point. The first order nature of the transition becomes more and more conspicuous as the deuterium-content increases. The critical deuterium content at which the order of the transition changes from second to first seems to be very low.
社団法人日本物理学会の論文
1976-08-15