SOME OPTICAL AND DIELECTRIC PROPERTIES OF YbF3 - DOPED CaF2 CRYSTALS
Pages 129-134
Irina Nicoara, M. Munteanu, N. Pecingina-Garjoaba, M. Stef, L. Lighezan
Abstract
Pure and YbF3-doped calcium fluoride crystals have been grown using the vertical Bridgman method.
The influence of the X-ray irradiation on the optical properties has been investigated. The real and
imaginary parts of the complex dielectric constant have been measured at five audio-frequencies over the
temperature range 150-300 K. From the observed relaxation processes the activation energy for various
structural defects has been determined.