6533b7d9fe1ef96bd126c113
RESEARCH PRODUCT
Anisotropic exchange coupling in the Keggin derivative K8[Co2(D2O)(W11O39)] · n D2O
Gordon KearlyHerma BüttnerEugenio CoronadoJ.m. ClementeHanspeter AndresHans U. GüdelMarkus ZollikerMichael Aebersoldsubject
DimerGeneral Physics and AstronomyInelastic neutron scatteringIonchemistry.chemical_compoundCrystallographysymbols.namesakechemistryDeuteriumOctahedronsymbolsNeutronPhysical and Theoretical ChemistryAnisotropyHamiltonian (quantum mechanics)description
Abstract 20 g of the fully deuterated title compound have been prepared in polycrystalline form and investigated by inelastic neutron scattering using both thermal and cold neutrons. Magnetic dimer excitations were observed and the energy-splitting pattern resulting from the exchange coupling within the Co 2+ dimer was determined. The coupling is highly anisotropic with the parameter values J =−2.24 meV and η =0.33 based on the effective coupling Hamiltonian H =−2J[S 1z S 2z +η(S 1x S 2x +S 1y S 2y )] . The anisotropy results mainly from the single-ion anisotropy of the Co 2+ ion in the distorted octahedral coordination.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-06-01 | Chemical Physics Letters |