Current-Induced Dynamics in Almost Symmetric Magnetic Nanopillars

Details Current-Induced Dynamics in Almost Symmetric Magnetic Nanopillars Current-Induced Dynamics in Almost Symmetric Magnetic Nanopillars

2008-10-05

arxiv.org/abs/0810.0863v1

Physics

Condensed Matter

Materials Science

4 pages, 3 figures

Scientific paper

Magnetic nanodevices usually include a free layer whose configuration can be changed by spin-polarized current via the spin transfer effect, and a fixed reference layer. Here, we demonstrate that the roles of the free and the reference layers interchange over a small range of their relative thicknesses. Precession of both layers can be induced by spin transfer in symmetric devices, but the dynamics of one of the layers is rapidly suppressed in asymmetric devices. We interpret our results in terms of the dynamical coupling between magnetic layers due to spin transfer.

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