Paramagnetic Resonance and Optical Spectra of Divalent Iron in Cubic Fields. I. Theory

Abstract

The energy level splittings of the ground state of the ${d}^{6}$ configuration in cubic and axial fields are given. The Zeeman splittings of the various levels are calculated for weak and strong magnetic fields. In the case of tetrahedral symmetry the effect of the perturbations of the odd parity configurations ${d}^{5}p$ and ${d}^{5}f$ on the ground state is estimated.