Spin-transfer-driven ferromagnetic resonance of individual nanomagnets.

نویسندگان

  • J C Sankey
  • P M Braganca
  • A G F Garcia
  • I N Krivorotov
  • R A Buhrman
  • D C Ralph
چکیده

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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عنوان ژورنال:
  • Physical review letters

دوره 96 22  شماره 

صفحات  -

تاریخ انتشار 2006