Calculation Of The Crystal Field Parameters For Eu³⁺ Doped In SrAl₂O₄ And SrIn₂O₄ Spinels

Strontium aluminate (SrAl₂O₄) and the indium aluminate (SrIn₂O₄) spinels have been proven to be efficient host materials, which offer the possibility of generating broadband emission after doping with rare earth trivalent ions. The present work is devoted to the calculation of the crystal field parameters and the energy levels of the trivalent europium doped in SrAl₂O₄ and SrIn₂O₄ spinels, using the superposition model of the crystal field. Using the intrinsic parameters for Eu³⁺-O²⁻ bonds, and the geometry structure of the each crystal, we modeled the CFP_s and simulated the low-lying energy levels schemes. The obtained results are compared with the experimental data and discussed.