Pressure dependence of the low-frequency dielectric constant of KNbO_3
arXiv:cond-mat/9707309 · doi:10.1002/1521-3951(199709)203:1<R1::AID-PSSB99991>3.0.CO;2-G
Abstract
The effect of pressure on the low-frequency dielectric constant, $ε_0$, of single crystals of KNbO_3 is investigated by means of capacitance measurements. The dielectric constant increases with pressure up to 22.5 kbar, where it exhibits a large value ($ε_0$ = 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.
4 pages latex, 1 postscript file included