Investigations of LiNbO_3 and LiTaO_3 Single Crystals for Pyroelectric Applications in the Wide Temperature Range

摘要

We present temperature dependences of pyroelectric response in LiNbO_3 and LiTaO_3 single crystals in operating condition as pyroelectric detectors and in the range 4,2- 400 K. In the range 200-400 K, the pyroelectric response is nearly constant. At low-temperature (40-80 K) the pyroelectric response is shown to be the largest. In the range 4,5-12 K, the sign of the pyroelectric coefficient is found to change. This could be used for temperature stabilization devices.