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A. Vernes, P. Weinberger, L. Szunyogh:
"Current-induced switching in Py/Cu/Py spin valves";
Physical Review B, 72 (2005), 012401-1 - 012401-4.

Current-induced switching in Py/Cu/Py spin valves with the Cu spacer thickness varying between 20 and
30 monolayers is described theoretically in terms of a multiscale approach based on ab initio calculations using
the fully relativistic screened Korringa-Kohn-Rostoker method and the Landau-Lifshitz-Gilbert equation. It is
found that in all investigated cases a perpendicular arrangement of the magnetic slabs is lowest in energy and
that therefore the critical current refers to a switching from this initial magnetic configuration to a collinear
magnetic configuration, the switching time being about 30 ps. Because the twisting energy as well as the
corresponding sheet resistance, both of them entering as key quantities the expression for the current, can be
viewed layer resolved, very clear conclusions can be drawn with respect to possible reductions of the critical
current.
DOI: 10.1103/PhysRevB.72.012401 PACS number s : 75.70.Cn, 75.30.Gw, 75.70.Ak

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC05937954