Energy levels of Er3+in CdIn2S4

Abstract
An analysis of the absorption and fluorescence spectra of Er3+ in CdIn2S4 has been made. The Slater-Condon and spin-orbit parameters giving the best overall agreement between the predicted 'free-ion' spectrum and the observed spectrum are F2=420 cm-1, F4=66 cm-1, F6=6.75 cm-1 and zeta =2350 cm-1. The observed Stark splittings are explained by a cubic crystal field potential with parameters A4(r4) =195cm-1 and A6(r6)=8cm-1. The electron spin resonance spectrum consists of four magnetically inequivalent sites with axes along (111) directions and may be interpreted as the gamma 8 ground state split by 2-3 cm-1.