Pressure dependence of the low-frequency dielectric constant of KNbO3
D. Errandonea, E. Moya
Abstract
The effect of pressure on the low-frequency dielectric constant, ε0, of single crystals of KNbO3 is investigated by means of capacitance measurements. The dielectric constant increases with pressure up to 22.5 kbar, where it exhibits a large value (ε0 = 5000), and then decreases. This change in its behaviour is related to a phase transition induced by pressure. On decompression, the samples do not revert back to the ambient pressure phase.
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