Modeling of the Experimental Molecular-Based Ring-Shaped Nanomagnets |
| M. Antkowiak, P. Kozłowski, G. Musiał, W. Florek, G. Kamieniarz
Faculty of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland and F. Esposito
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| Quantum transfer matrix technique and numerically exact diagonalization method are applied to the Heisenberg spin systems to model ring-shaped molecules. Two cases are investigated: (i) a dozen of S = 1 spins with additional biquadratic exchange and (ii) a dimetallic molecule Cr7Cd, where it is assumed that exchange anisotropy is determined in a local coordination system. In the latter case the calculated susceptibility is compared with experimental results. |
| DOI: 10.12693/APhysPolA.118.965 PACS numbers: 75.40.Cx, 75.40.Mg |