Abstract

Dielectric losses were measured in the following crystals NaCl+ (Mg 2+, Co 2+, Ni 2+, Sr 2+, Ca 2+, Mn 2+, Zn 2+, Cd 2+, Ba 2+, Pb 2+), KCl + (Ca 2+, Sr 2+, Ba 2+, 2+, Pb 2+) and KBr + (Sr 2+, Ba 2+) in the frequency region 5–500 kHz. It was found that when the divalent cation impurity has an electronic configuration similar to the inert gases (1) no observable deviation from simple Debye theory exists (2) the activation energy Φ increases linearly with the ionic radius of the impurity. The above observations (1) and (2) do not hold when the divalent cation impurity has d-electrons in the outer subshell.

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