Dielectric Properties of KLiSO₄

Abstract

Dielectric constant, thermal expansion coefficent, d c resistivity, and pyroelectric current of KLiSO 4 were measured in the temperature range covering its transition point. The former three quantities revealed anomalies at the transition point and the temperature hysteresis of about 10°C was observed. The D-E curve showed no anomaly and the reversion of the pyroelectric current by the d c poling was not observed. It is concluded that the crystal is polar but not ferroelectric.