Phys. Rev. Lett. 96, 227601 (2006) [4 pages]Spin-Transfer-Driven Ferromagnetic Resonance of Individual NanomagnetsReceived 4 February 2006; published 5 June 2006 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. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.227601
DOI:
10.1103/PhysRevLett.96.227601
PACS:
76.50.+g, 72.25.Ba, 75.30.Ds, 75.75.+a
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