Step-induced unusual magnetic properties of ultrathin Co/Cu films: ab initio study

Details Step-induced unusual magnetic properties of ultrathin Co/Cu films: ab initio study Step-induced unusual magnetic properties of ultrathin Co/Cu films: ab initio study

1996-08-07

arxiv.org/abs/cond-mat/9608038v1

Physics

Condensed Matter

10 pages, RevTeX 3.0, 4 PostScript figures available on request from A. Bratkovsky at alexb@hpl.hp.com

Scientific paper

10.1103/PhysRevB.54.R17371

We have performed ab initio studies to elucidate the unusual magnetic behavior recently observed in epitaxial Co films upon absorption of submonolayers of Cu and other materials. We find that a submonolayer amount of Cu on a stepped Co/Cu (100) film changes dramatically the electronic and magnetic structure of the system. The effect is mainly due to hybridization of Co and Cu $d$-electrons when copper forms a ``wire'' next to a Co step at the surface. As a result, a non-collinear arrangement of magnetic moments (switching of the easy axis) is promoted. [PACS 75.70.Ak,75.70.-i]

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