Influence of external magnetic fields on growth of alloy nanoclusters

Details Influence of external magnetic fields on growth of alloy nanoclusters Influence of external magnetic fields on growth of alloy nanoclusters

2006-10-23

arxiv.org/abs/cond-mat/0610589v1

Physics

Condensed Matter

Materials Science

10 pages, 3 figures

Scientific paper

Kinetic Monte Carlo simulations are performed to study the influence of external magnetic fields on the growth of magnetic fcc binary alloy nanoclusters with perpendicular magnetic anisotropy. The underlying kinetic model is designed to describe essential structural and magnetic properties of CoPt_3-type clusters grown on a weakly interacting substrate through molecular beam epitaxy. The results suggest that perpendicular magnetic anisotropy can be enhanced when the field is applied during growth. For equilibrium bulk systems a significant shift of the onset temperature for L1_2 ordering is found, in agreement with predictions from Landau theory. Stronger field induced effects can be expected for magnetic fcc-alloys undergoing L1_0 ordering.

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