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Dielectric Properties of Lossy KH2PO4 Crystals

Single crystals of KH2PO4 have been prepared from aqueous solutions which contain a large amount of KOH. These crystals have high dielectric constants and dielectric losses at room temperature and show dielectric dispersion below about 105 Hz. The dispersion frequency increases with the increase of the amount of KOH in the aqueous solution. In the ferroelectric phase, these crystals exhibit low dielectric constants and show anomalous frequency dependence of the coercive field.