The reorientation of dipole centres in CaF2: RE3+ (RE: Gd, Tb, Lu) is investigated by the method of ionic thermocurrent (ITC). ITC peaks below 200 K are caused by reorientation of RE3+-F--complexes and related dipole centres, whereas peaks above 200 K seem to be of other origin. Both types of ITC peaks cannot be discriminated by polarization field strength dependence.
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A Journal of Physical Sciences: Zeitschrift für Naturforschung A (ZNA) is an international scientific journal which publishes original research papers from all areas of experimental and theoretical physics. In accordance with the name of the journal, which means “Journal for Natural Sciences”, manuscripts submitted to ZNA should have a tangible connection to actual physical phenomena.