Pressure dependence of the low-frequency dielectric constant of KNbO_3

Details Pressure dependence of the low-frequency dielectric constant of KNbO_3 Pressure dependence of the low-frequency dielectric constant of KNbO_3

1997-07-30

arxiv.org/abs/cond-mat/9707309v1

Physica Status Solidi (b) 203, R1 (1997)

Physics

Condensed Matter

Materials Science

4 pages latex, 1 postscript file included

Scientific paper

The effect of pressure on the low-frequency dielectric constant, $\epsilon_0$, 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 ($\epsilon_0$ = 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.

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