The nature of the pyroelectric effect of faulted ZnS crystals

The pyroelectric effect (PE) in faulted ZnS crystals was studied experimentally in the temperature range from 100 to 300 °K. It has been found that the observed voltage pulses are due to a special pyroelectric effect which is not connected with the temperature dilation of the unit cell or any resulting change in the value of its dipole moment. The observed pyroelectric effect has been correlated with built‐in electric fields in faulted ZnS crystals. Its temperature dependence is attributed to the different magnitude of the temperature dependence of the dielectric constants in the different ZnS crystal structures.