Changing the Magnetic Configurations of Nanoclusters Atom-by-Atom

Details Changing the Magnetic Configurations of Nanoclusters Atom-by-Atom Changing the Magnetic Configurations of Nanoclusters Atom-by-Atom

2006-08-22

arxiv.org/abs/cond-mat/0608481v1

Phys. Rev. B 75, 174436 (2007)

Physics

Condensed Matter

Materials Science

7 pages

Scientific paper

The Korringa-Kohn-Rostoker Green (KKR) function method for non-collinear magnetic structures was applied on Mn and Cr ad-clusters deposited on the Ni(111) surface. By considering various dimers, trimers and tetramers, a large amount of collinear and non-collinear magnetic structures is obtained. Typically all compact clusters have very small total moments, while the more open structures exhibit sizeable total moments, which is a result of the complex frustration mechanism in these systems. Thus, as the motion of a single adatom changes the cluster structure from compact to open and vice versa, this can be considered as a magnetic switch, which via the local exchange field of the adatom allows to switch the cluster moment on and off, and which might be useful for future nanosize information storage.

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