Abstract

Abstract Experimental results of an EPR-study of the concentration dependence of the doubly integrated intensity and linewidth of the signals associated with tetragonal Ce3+-F−-dipoles in Srl-xCexF2+x, Sr1-0.005-x Ce0.005LaxF2+0.005+x and Srl-0.005-x Ce0.0005YxF2+0.005+x are presented. Both show a nonlinear behaviour. Besides the tetragonal defects no other symmetries have been found.

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