Anomaly in Pyroelectric Current Generation with Varying Lithium Tantalate Single Crystal Temperature with a Constant Rate

Recently, it was established that the X-ray generation intensity increases in a certain range of temperature variation rates (6–8°C/min) of lithium tantalate single crystal (LiTaO 3 ). In this work, the pyroelectric current generation is studied as a function of the temperature variation rate. Four stages of the pyroelectric current generation dynamics are determined. In the same rate range (6–8°C/min), an anomalously long stage of current saturation is observed, which is most likely the cause of the observed effect of an increase in the X-ray intensity. The observed anomaly is described, as well as systematic features in the pyroelectric current dynamics with varying the pyroelectric material temperature with a constant rate.