Ham effect in the 4T1g state of Fe3+ doped in KMgF3
Pages 83-87
A. Reisz, C. N. Avram
Abstract. The aim of this paper is to investigate the Ham reduction of spin- orbit splitting of first excited state of iron doped KMgF3:Fe3+ .In this crystal Fe3+ will substitute a Mg2+ ion and will be surrounded by six fluorine ions having a octahedral site symmetry. Using the parameters Dq, B, C and ? of Fe3+ in an octahedral crystal field, we diagonalised the Eisenstein matrices and obtained the fine structure of the energy levels of ferric ion. The fine structure of the energy level 4T1g state (Γ6,Γ7,Γ8a and Γ8b) is more larger than that experimental one due to Ham effect as result of Jahn-Teller interaction in first excited state of ferric ion doped in KMgF3 crystal. We found the Ham quenching factor for which the theoretical and experimental data fit. Finally the ratio EJT/hω was calculated and the results are discussed.