Optical absorption of Co2+ in LiCoPO4

Optical spectra of Co2+ in LiCoPO4 are analysed theoretically by using a cr ystal-field Hamiltonian of C-S local symmetry. In this analysis the energy level scheme is determined. Crystal-field parameters are obtained. The infl uence of the spin-orbit interaction is also considered. Using symmetry cons iderations the polarised optical absorption spectrum in LiCoPO4 is briefly discussed. Calculations of the temperature dependence of magnetic susceptib ility are performed using only a F-4 basis. Calculated results are compared with experimental data and satisfactory agreement has been obtained. (C) 1 999 Elsevier Science B.V. All rights reserved.