Crystals of Ba2+-doped material were studied by using dielectric loss and ionic conductivity methods. The first method revealed the existence of 2 relaxation mechanisms. The first mechanism was attributed to the reorientation of ion-vacancy dipoles by means of nearest-neighbor to nearest-neighbor jumps. The estimated activation enthalpy and pre-exponential factor were equal to 0.43eV and 3.30 x 10-9s. The other mechanism was attributed to nearest-neighbor to next-nearest neighbor jumps. The corresponding parameters were 0.34ev and 2.75 x 10-8s. The ionic conductivity method indicated that the migration enthalpy of free vacancies was equal to about 0.67ev.

Dielectric Losses and Ionic Conductivity of LiF:Ba2+. J.Grammatikakis, A.Papathanassiou, N.Bogris, M.Manolopoulos, V.Katsika: Physical Review B, 1992, 46[19], 12142-4