Author/Authors :
Andres، نويسنده , , Hanspeter and Aebersold، نويسنده , , Michael and Güdel، نويسنده , , Hans U. and Clemente، نويسنده , , Juan M. and Coronado، نويسنده , , Eugenio and Büttner، نويسنده , , Herma and Kearly، نويسنده , , Gordon and Zolliker، نويسنده , , Markus، نويسنده ,
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 Co2+ 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 Ĥ=−2J[S1zS2z+η(S1xS2x+S1yS2y)]. The anisotropy results mainly from the single-ion anisotropy of the Co2+ ion in the distorted octahedral coordination.
