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
Dipartimento di Scienze Fisiche, Universita di Napoli, Napoli, Italy

Full Text PDF
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