Current-Induced Nanomagnet Dynamics for Magnetic Fields Perpendicular to the Sample Plane

Details Current-Induced Nanomagnet Dynamics for Magnetic Fields Perpendicular to the Sample Plane Current-Induced Nanomagnet Dynamics for Magnetic Fields Perpendicular to the Sample Plane

2004-03-03

arxiv.org/abs/cond-mat/0403100v1

Physics

Condensed Matter

Materials Science

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.93.036601

We present electrical measurements of high-frequency magnetic dynamics excited by spin-polarized currents in Co/Cu/Ni80Fe20 nanopillar devices, with a magnetic field applied perpendicular to the sample layers. As a function of current and magnetic field, the dynamical phase diagram contains several distinguishable precessional modes and also static magnetic states. Using detailed comparisons with numerical simulations, we provide rigorous tests of the theory of spin-transfer torques.

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