Magneto-optical properties of [Li]0 defects in MgO

Magnetic circular dichroism and optical absorption spectra are reported for MgO crystals containing Li]⁰ defects. The spectra are identified by optical detection of the Li]⁰ ground-state paramagnetic resonance spectrum. The spectra are interpreted for both the ion and polaron models of the defect. Either model gives a qualitative interpretation of the spectra, but neither gives quantitative agreement.