Magnetic Properties of the Solid Solutions between KMnF₃, KCoF₃ and KNiF₃

Abstract

In order to obtain informations on superexchange interaction, the magnetic susceptibility of KNiF₃ and the solid solutions between KMnF₃, KCoF₃ and KNiF₃ has been measured in the temperature range between 80°K and 850°K. The values of exchange integral |J⁄k| between the two adjacent magnetic ions are derived by use of the molecular field approximation and by use of the Danielian-Stevens (D-S) procedure as follows:
(Remark: Graphics omitted.)
From θ all of the superexchange interactions are supposed to be antiferromagnetic.