Abstract
The hydrostatic-pressure dependence of the refractive index and the low-frequency dielectric constant of a perovskite-type single crystal, KMg, have been determined at room temperature. The refractive index for nm increases monotonously in proportion to pressure with a slope of . On the other hand, the dielectric constant at 10 kHz decreases with increasing pressure, from which the electric-displacement-related electrostrictive coefficient () is calculated as 0.24 . These data are compared with the values and the coefficients of various alkali fluorides and perovskite oxides.
- Received 30 June 1983
DOI:https://doi.org/10.1103/PhysRevB.29.6921
©1984 American Physical Society