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Two Spin–Orbit Coupling Parameter Model of the Gyromagnetic Factor for d 8 Clusters in Tetragonal Symmetry
Author(s) -
Chen JiaJun,
Du MaoLu,
Chen KangSheng
Publication year - 1992
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221700123
Subject(s) - tetragonal crystal system , ion , excited state , spin–orbit interaction , coupling parameter , coupling (piping) , perturbation (astronomy) , atomic physics , symmetry (geometry) , perturbation theory (quantum mechanics) , spin (aerodynamics) , chemistry , physics , ground state , orbit (dynamics) , molecular physics , condensed matter physics , materials science , quantum mechanics , thermodynamics , geometry , phase (matter) , mathematics , metallurgy , aerospace engineering , engineering
An analytical perturbation formula of the gyromagnetic factor for the ground state 3 A 2 (F) of d 8 ions, in which not only the contribution from spin–orbit coupling of the central transition metal ion but also that of ligand ions is included, are obtained in tetragonal symmetry. In the derivation, the contribution of all excited states for the g ‐factor is considered, and no adjustable parameter is introduced. The molecular orbital coefficients are determined by means of a semiempirical method for estimating the g ‐factor. The contribution of the spin–orbit coupling of ligand ions to the g ‐shift is discussed in some pseudo‐tetragonal Ni(II) compounds. The results show that the contribution must be considered, especially when the ligand ions have large spin–orbit coupling parameters. The calculation results agree well with experimental findings.