Answers are grounded in this paper and cite their sources.
The reflectivity spectra of yttrium iron garnet (YIG, Y3Fe5O12) and yttrium gallium garnet (YGG, Y3Ga5O12) have been measured in the energy range 2–7.5 eV. Structure is observed in YIG which can be attributed to charge-transfer-enhanced crystal field transitions and in YGG to critical point transitions.
No takes yet. Share an insight, caveat, or question.
P. M. Grant (1967) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: