Simulation of triplet state EPR spectra from dimers: g and D tensors not coaxial

Abstract
Expressions for the EPR transition fields and probabilities as a function of angle for pairs of S = 1/2 paramagnetic ions, coupled by exchange and anisotropic exchange/dipolar interactions, have been calculated for situations where the g and D tensors do not have the same axes. The nuclear hyperfine interaction has been included and the formulas derived have been used to produce simulated EPR spectra for comparison with experimental results.