Dielectric Relaxation in Alkaline-Earth Fluoride Crystals

Abstract

Dielectric absorption has been investigated over a temperature range from -34 to 450°C and a frequency range from 1 to ${10}^6$ cps for doped Ca${\mathrm{F}}_2$, Ba${\mathrm{F}}_2$, and Sr${\mathrm{F}}_2$ crystals. The activation and association energies for the dipolar complexes have been determined. The activation energy for Ca${\mathrm{F}}_2$ doped with 0.01-mole% Y${\mathrm{F}}_3$ was found to be 1.17 eV.