title: Spin-transfer-driven ferromagnetic resonance of individual nanomagnets.
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.
authors.affiliation: Cornell University, Ithaca, New York 14853, USA.
authors.forename: J C
authors.initials: JC
authors.lastname: Sankey
authors.forename: P M
authors.initials: PM
authors.lastname: Braganca
authors.forename: A G F
authors.initials: AG
authors.lastname: Garcia
authors.forename: I N
authors.initials: IN
authors.lastname: Krivorotov
authors.forename: R A
authors.initials: RA
authors.lastname: Buhrman
authors.forename: D C
authors.initials: DC
authors.lastname: Ralph