Thermally stimulated depolarization currents in LiF+Be 2+

Abstract

The reorientation of dipolar complexes in a LiF single crystal doped with Be 2+ has been studied by means of the thermally stimulated depolarization currents technique (T.S.D.C) in the temperature region 80–300 K. Three main bands were observed. The low temperature band has an enthalpy smaller by a factor of two than the intermediate band. The enthalpy of the latter is comparable to that of the migration process of the free cation vacancy but smaller (i.e. by 40%) than the enthalpy of the high temperature band. The general behaviour is similar to that of the systems: KCl + Be 2+ and NaCl + Be 2+ studies two decades ago.