Abstract
In the present paper, we report on analysis of fine structure of energy levels of Cr3+ in octahedral and trigonal crystal field of host matrix KMgF3. The fine structure of the energy levels of the studied system was obtaining by diagonalization of Cr3+ Hamiltonian, which take into account the crystal field parameters, spin‐orbit interaction and vibronic interaction. Due to vibronic interaction in 4T2g first excited state of impurity ion the Jahn‐Teller effect should be considered in modeling the optical spectra of Cr3+:KMgF3. The results complete that previously obtained ones by taking into account an average reduction factor due to the covalence.
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