Abstract:
Numerical transfer-matrix approach and exact diagonalization technique exploiting the point-group symmetry and the properties of the shift operator are worked out in the framework of quantum statistical mechanics for the isotropic Heisenberg spin Hamiltonian with the ring geometry. They are applied in large-scale simulations to the title high nuclearity cyclic clusters Mn6 (i.e. [Mn(hfac)2NITPh]6) and Ni12 (i.e. Ni12(O2CMe)12(chp)12(H2O)6(THF)6) in order to model quantitatively their magnetic properties. For Ni12 complex new experimental susceptibility data are also reported. New microscopic spin model parameters for both molecules are obtained from a fit of the theoretical susceptibility curves to the experimental results.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received 11 May 2001 and Received in final form 24 July 2001
Rights and permissions
About this article
Cite this article
Kamieniarz, G., Matysiak, R., Caramico D'Auria, A. et al. Finite-temperature characterization and simulations of the molecular assemblies Mn 6 and Ni 12 . Eur. Phys. J. B 23, 183–189 (2001). https://doi.org/10.1007/s100510170067
Issue Date:
DOI: https://doi.org/10.1007/s100510170067