A ligand-field study of the ground spin-state magnetic anisotropy in a family of hexanuclear Mn(III) single-molecule magnets.
A ligand field analysis of two structurally related hexanuclear Mn(iii) coordination complexes reveals that the observed difference in their ground spin-state anisotropy originates from the difference in projection coefficients of the single-ion anisotropy to spin states of different total spin quantum-number, S, rather than the geometrical distortions of the metal ions. Furthermore we show that the single-ion second order anisotropy induces fourth and higher order anisotropy terms to the ground spin states of the studied systems, as a consequence of spin-state mixing effects due to the comparable magnitude of the single-ion second order anisotropy and the isotropic exchange parameters.
Piligkos
Stergios
S
Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100, Denmark. piligkos@kiku.dk
Bendix
Jesper
J
Weihe
Høgni
H
Milios
Constantinos J
CJ
Brechin
Euan K
EK