Domain walls and domain wall resistivities in Co_xPd_1−x(111) and Co_xPt_1−x(111)

Peter Weinberger (1)

1 Center for Computational Nanoscience

In using the relativistic Screened Korringa-Kohn-Rostoker method and a multi-scale approach based on a parametrization of the Ginzburg-Landau expansion of the free-energy as a functional of the magnetization density, domain wall widths in CoxPd1−x and CoxPt 1−x are determined by considering these substitutionally disordered alloys as two-dimensionally invariant systems. It is shown that in CoxPd1−x domains are formed nearly over the whole concentration range, while in CoxPt1−x domain wall formation only occurs near 50% Co and for Co rich alloys. Based on these results resistivities in the presence and absence of domains walls are evaluated in terms of the relativistic Kubo-Greenwood equation. In contrast to CoxNi1−x, it turns out that both systems are unsuitable as rack track materials.

Mots clés: Physical Sciences

Peter Weinberger. Domain walls and domain wall resistivities in Co_xPd_1−x(111) and Co_xPt_1−x(111). Philosophical Magazine, 2009, 89 (22-24), pp.1933-1946. ⟨10.1080/14786430802698894⟩. ⟨hal-00514010⟩