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Verlagsausgabe
DOI: 10.5445/IR/1000048073

Magnetic anisotropy of graphene quantum dots decorated with a ruthenium adatom

Beljakov, I.; Meded, V.; Symalla, F.; Fink, K.; Shallcross, S.; Wenzel, W.

Abstract:
The creation of magnetic storage devices by decoration of a graphene sheet by magnetic transition-metal adatoms, utilizing the high in-plane versus out-of-plane magnetic anisotropy energy (MAE), has recently been proposed. This concept is extended in our density-functional-based modeling study by incorporating the influence of the graphene edge on the MAE. We consider triangular graphene flakes with both armchair and zigzag edges in which a single ruthenium adatom is placed at symmetrically inequivalent positions. Depending on the edge-type, the graphene edge was found to influence the MAE in opposite ways: for the armchair flake the MAE increases close to the edge, while the opposite is true for the zigzag edge. Additionally, in-plane pinning of the magnetization direction perpendicular to the edge itself is observed for the first time.


Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für Physikalische Chemie (IPC)
Publikationstyp Zeitschriftenaufsatz
Jahr 2013
Sprache Englisch
Identifikator ISSN: 2190-4286
URN: urn:nbn:de:swb:90-480732
KITopen ID: 1000048073
HGF-Programm 43.11.03; LK 01
Erschienen in Beilstein journal of nanotechnology
Band 4
Heft 1
Seiten 441-445
Schlagworte Adsorbate, grapheme, graphene quantum dot, magnetic anisotropy, transition metal
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