title: Time-domain measurements of nanomagnet dynamics driven by spin-transfer torques.
abstract: We present time-resolved measurements of gigahertz-scale magnetic dynamics caused by torque from a spin-polarized current. By working in the time domain, we determined the motion of the magnetic moment throughout the process of spin-transfer-driven switching, and we measured turn-on times of steady-state precessional modes. Time-resolved studies of magnetic relaxation allow for the direct measurement of magnetic damping in a nanomagnet and prove that this damping can be controlled electrically using spin-polarized currents.
authors.affiliation: Cornell University, Ithaca, NY 14853, USA. ink3@cornell.edu
authors.forename: I N
authors.initials: IN
authors.lastname: Krivorotov
authors.forename: N C
authors.initials: NC
authors.lastname: Emley
authors.forename: J C
authors.initials: JC
authors.lastname: Sankey
authors.forename: S I
authors.initials: SI
authors.lastname: Kiselev
authors.forename: D C
authors.initials: DC
authors.lastname: Ralph
authors.forename: R A
authors.initials: RA
authors.lastname: Buhrman