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. 2006 Jun 9;96(22):227601.
doi: 10.1103/PhysRevLett.96.227601. Epub 2006 Jun 5.

Spin-transfer-driven ferromagnetic resonance of individual nanomagnets

J C Sankey  1 , P M Braganca, A G F Garcia, I N Krivorotov, R A Buhrman, D C Ralph
Affiliations

Spin-transfer-driven ferromagnetic resonance of individual nanomagnets

J C Sankey et al. Phys Rev Lett. .

Abstract

We demonstrate a technique that enables ferromagnetic resonance measurements of the normal modes for magnetic excitations in individual nanoscale ferromagnets, smaller in volume by more than a factor of 50 compared to individual ferromagnetic samples measured by other resonance techniques. Studies of the resonance frequencies, amplitudes, linewidths, and line shapes as a function of microwave power, dc current, and magnetic field provide detailed new information about the exchange, damping, and spin-transfer torques that govern the dynamics in magnetic nanostructures.

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