Perpendicular magnetic anisotropy in nanoclusters caused by surface segregation and shape

Details Perpendicular magnetic anisotropy in nanoclusters caused by surface segregation and shape Perpendicular magnetic anisotropy in nanoclusters caused by surface segregation and shape

2005-10-07

arxiv.org/abs/cond-mat/0510196v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 figures

Scientific paper

The growth of binary alloy clusters on a weakly interacting substrate through codeposition of two atomic species is studied by kinetic Monte Carlo simulation. Our model describes salient features of CoPt$_3$-nanoclusters, as obtained recently by the molecular-beam epitaxy technique. The clusters display perpendicular magnetic anisotropy (PMA) in a temperature window of growth favorable for applications. This temperature window is found to arise from the interplay of Pt surface segregation and aspect ratio for cluster shapes. Conclusions are drawn how to optimize growth parameters with respect to PMA.

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