Effective g Tensor of a Pair of Dissimilar Ions in the Strong Isotropic Exchange Limit

Abstract

Abstract A study of the spin-pair Hamiltonian with regard to the effective g-factor in the strong isotropic exchange limit is presented. The case of two different spins with anisotropic g(i) and D(i) tensors is considered. Effective gs and Ds tensors for the various total spin S values are deduced in terms of the corresponding single-ion parameters. The characteristics of the resultant gs -tensor, in the case of an ion-pair with Cσ symmetry, are treated in detail. The principal values are linear expressions of the single-ion principal values and the principal directions relative to different 5 values result to be correlated in a characteristic manner. The limits of the present strong exchange treatment are also discussed.