Controlled normal and inverse magnetoresistance and current-driven magnetization switching in magnetic nanopillars

Details Controlled normal and inverse magnetoresistance and current-driven magnetization switching in magnetic nanopillars Controlled normal and inverse magnetoresistance and current-driven magnetization switching in magnetic nanopillars

2003-12-18

arxiv.org/abs/cond-mat/0312475v1

Physics

Condensed Matter

Materials Science

4 pages, 5 figures, submitted to PRL

Scientific paper

Combining pairs of ferromagnetic metals with different signs of scattering anisotropies, let us independently invert the magnetoresistance and the direction of current-driven switching in ferromagnetic/non-magnetic/ferromagnetic metal nanopillars. We show all four combinations of normal and inverse behaviors, at both room temperature and 4.2K. In all cases studied, the direction of switching is set by the net scattering anisotropy of the fixed (polarizing) ferromagnet. We provide simple arguments for what we see.

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