Abstract of Publication No. 281
M. Aebersold, H. P.
Andres, H. Büttner, J. J. Borrás-Almenar, J. M. Clemente, E.
Coronado, H. U. Güdel and D. Kaerly
The metal-oxide clusters with formula
which contain a tetrameric magnetic cluster M4O16 provide
an ideal series for the study of magnetic exchange interactions in polymetallic
molecular clusters. To get a more direct information on the splitting of the
spin states caused by the exchange interactions we have performed inelastic
neutron scattering measurements on the Co, Mn and Ni clusters. Magnetic
excitations have been observed in the range 0.5-6 meV. A tentative
interpretation of these data from a Heisenberg exchange Hamiltonian and a single
ion zero-field splitting is presented for Ni cluster.