Abstract
The static dielectric constant of rutile has been measured as a function of temperature from 1.6 to 1060°K. Rutile does not appear to be ferroelectric or antiferroelectric in this temperature range. At low temperatures, approaches a limiting value of 257 in the direction and 111 in the direction. , respectively, and . The ionic polarizability of titanium is calculated using the previously derived Lorentz correction in the rutile structure. The polarizability at all temperatures is very close to the critical value for a ferroelectric polarization catastrophe. The temperature variation of the ionic polarizability is explained qualitatively on the basis of other properties of the crystal.
- Received 8 June 1961
DOI:https://doi.org/10.1103/PhysRev.124.1719
©1961 American Physical Society