The effect of electric field on hysteresis phenomena in $Rb_2ZnCl_4$ crystals grown from the solution and from the melt

Hysteresis phenomena on the curve of permittivity versus applied electric field and temperature in the region of the Сuriе temperature have been studied for $Rb_2ZnCl_4$ crystals grown from the solution and from the melt. The results indicate that hysteresis phenomena depend on the defect concentration of the specimen crystal structure.