The effect of antisymmetric exchange on the E.P.R. spectra of coupled pairs of transition metal ions

Abstract

The antisymmetric exchange term (AET) in the exchange spin hamiltonian, d. S1×S2 , can have sizeable effects on the EPR spectra of hetero-dinuclear transition metal complexes. In this paper we review briefly the symmetry aspects of the AET and give a general formulation for its matrix elements for any pair of S 1, S 2 values. The effects of the AET on the E.P.R. spectra are discussed and one case where its presence can be recognized is shown.