Abstract
The shear elastic constants and and both the free and clamped -axis dielectric constant have been measured in the paraelectric phase of single-crystal cesium dihydrogen arsenate. The temperature variation of is well described by an elastic Curie expression arising from linear piezoelectric coupling. A 20-K difference between the free and clamped Curie temperatures is obtained from an analysis of the elastic measurements and directly from the -axis dielectric measurements. The -axis dielectric constant, which has been measured between 90 and 300 K, shows antiferroelectric characteristics and exhibits a well-defined first-order discontinuity.
- Received 13 January 1975
DOI:https://doi.org/10.1103/PhysRevB.12.362
©1975 American Physical Society