The structure and magnetic properties of oligonuclear manganese complex [Mn(hfa)2cpo]2 (where hfa is hexafluoroacetylacetonate dehydrate and cpo is 4-cyanopyridine-N-oxide) are presented. In the unit cell, the dinuclear molecules are well isolated from each other. The non-monotonous dependence of magnetic susceptibility is explained in terms of the hierarchy of exchange parameters by using exact diagonalization. The thermodynamic behavior of pure cpo and [Mn(hfa)2(cpo)]2 is simulated numerically in a dimer approximation by an extrapolation to spin S = 5/2. The Mn-Mn exchange integral is evaluated.
@article{arxiv.1211.6288,
title = {Exchange Interactions in a Dinuclear Manganese (II) Complex with Cyanopyridine-N-oxide Bridging Ligands},
author = {A. S. Markosyan and I. Yu. Gaidukova and A. V. Ruchkin and A. O. Anokhin and V. Yu. Irkhin and M. V. Ryazanov and N. P. Kuz'mina and V. N. Nikiforov},
journal= {arXiv preprint arXiv:1211.6288},
year = {2013}
}