The dielectric properties of the crystal were investigated under hydrostatic pressure. Pressure effects on its dielectric properties are due to the shift of the paraelectric - ferroelectric transition temperature with pressure. With increasing pressure p, decreases greatly with .
Electro-optic responses accompanied by field induced phase transitions from the ferroelectric state to the antiferroelectric state have been studied. The response time obtained with very short pulse of reverse polar voltage is seven hundred times as short as that without reverse pulse voltage. From the viewpoint of application, a two-field matrix-addressing waveform is also proposed.
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