Analysis of Ground-State Zero-Field Splitting for Mn2+ in ZnNbOF5.6(H2O) and CoNbOF5·6(H2O)

摘要

@@ The electron paramagnetic resonance spectra of trigonal Mn<'2+> centers in ZnNbOF<,5>·6(H<,2>O) and CoNbOF<,5>·6(H<,2>O) crystals are studied on the basis of the complete energy matrices for a d<'5> configuration ion in a trigonal ligand field.It is demonstrated that the local lattice structure around a trigonal Mn<'2+> center has an elongation dis- tortion along the crystalline ca axis, and when Mn<'2+> is doped in the ZnNbOF<,5>·6(H<,2>O) and CoNbOF<,5>.6(H<,2>O) crystals, there is a similar local distortion.From the EPR calculation, the local lattice structure parameters for trigonal Mn<'2+> centers in ZnNhOF<,5>·6(H<,2>O) and CoNbOF<,5>·6(H<,2>O) are determined.