Double hysteresis loops in deuterated triglycine sulfate after thermal depolarization

The temperature behavior of the hysteresis loops and switching current parameters measured in the increasing field have been studied in single crystals of deuterated triglycine sulfate. We have revealed the hysteresis loops doubling leading to appearance of additional maxima at the field/time dependence of the switching current during cooling from 59.3 to 51.4 degrees C. This effect was attributed to the bias fields arising as a result of bulk screening of depolarization field. Different current maxima corresponded to the switching in the areas with different values of bias field.