Non-uniform coupling model of the frustrated chromium-based ring Cr8Ni
Department of Physics, A. Mickiewicz University, Poznań, Poland
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Published online: 3 July 2014
A numerically exact spin-Hamiltonian approach has been proposed for the frustrated Cr8Ni molecule. The non-uniform exchange couplings parameters, improving the fit of the experimental magnetic susceptibility data, have been obtained, using a genetic algorithm search procedure. The energy intervals between the lowest multiplets, relevant for envisaged transitions observable in the INS spectra, have been determined and the critical fields corresponding to the first-level crossing have been estimated in agreement with experiment.
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