Ab-initio GMR and current-induced torques in Au/Cr multilayers

Details Ab-initio GMR and current-induced torques in Au/Cr multilayers Ab-initio GMR and current-induced torques in Au/Cr multilayers

2006-11-23

arxiv.org/abs/cond-mat/0611599v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 6 figures

Scientific paper

10.1103/PhysRevB.75.174428

We report on an {\em ab-initio} study of giant magnetoresistance (GMR) and current-induced-torques (CITs) in Cr/Au multilayers that is based on non-equilibrium Green's functions and spin density functional theory. We find substantial GMR due primarily to a spin-dependent resonance centered at the Cr/Au interface and predict that the CITs are strong enough to switch the antiferromagnetic order parameter at current-densities $\sim 100$ times smaller than typical ferromagnetic metal circuit switching densities.

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