Comparative study between crystal field parameters for Mn4+:K2SiF6 and Mn4+:Na2SiF6
Pages 118-122
Ramona Nistora, N. M. Avram
Abstract
The aim of this paper is to model the crystal field parameters for Mn4+ doped in K2SiF6 respectively in Na2SiF6 crystal, in the Exchange Charge Model of the crystal field theory. By doping Mn4+ in K2SiF6 and Mn4+ in Na2SiF6 crystals the manganese ion will substitutes the Si4+ with octahedral coordination formed by F- ions, but with different site symmetry. The theoretical parameters of the crystal field acting on the Mn4+ ion will be calculated in the frame of the symmetry adapted axes system of the local symmetry for each host matrix and will be compared between them. Using these parameters we simulated the energy level schemes for each considered system and the comparison with experimental data and between them shows a satisfactory agreement.