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J Phys Condens Matter. 2015 Feb 11;27(5):056004. doi: 10.1088/0953-8984/27/5/056004. Epub 2015 Jan 21.

Trends in magnetism of free Rh clusters via relativistic ab-initio calculations.

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Institute of Physics of the ASCR v. v. i., Cukrovarnická 10, CZ-162 53 Prague, Czech Republic.


A fully relativistic ab-initio study on free Rh clusters of 13-135 atoms is performed to identify general trends concerning their magnetism and to check whether concepts which proved to be useful in interpreting magnetism of 3d metals are applicable to magnetism of 4d systems. We found that there is no systematic relation between local magnetic moments and coordination numbers. On the other hand, the Stoner model appears well-suited both as a criterion for the onset of magnetism and as a guide for the dependence of local magnetic moments on the site-resolved density of states at the Fermi level. Large orbital magnetic moments antiparallel to spin magnetic moments were found for some sites. The intra-atomic magnetic dipole Tz term can be quite large at certain sites but as a whole it is unlikely to affect the interpretation of x-ray magnetic circular dichroism experiments based on the sum rules.

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