Publication Date:
2015-08-12
Description:
Analyses of the local crystal and electronic structure in the vicinity of Fe 3+ centers in perovskite KMgF 3 crystal have been carried out in a comprehensive manner. A combination of density functional theory (DFT) and a semi-empirical superposition model (SPM) is used for a complete analysis of all Fe 3+ centers in this study for the first time. Some quantitative information has been derived from the DFT calculations on both the electronic structure and the local geometry around Fe 3+ centers. All of the trigonal (K-vacancy case, K-Li substitution case, and normal trigonal Fe 3+ center case), FeF 5 O cluster, and tetragonal (Mg-vacancy and Mg-Li substitution cases) centers have been taken into account based on the previously suggested experimental and theoretical inferences. The collaboration between the experimental data and the results of both DFT and SPM calculations provides us to understand most probable structural model for Fe 3+ centers in KMgF 3 .
Print ISSN:
0021-8979
Electronic ISSN:
1089-7550
Topics:
Physics