title: Resonance measurement of nonlocal spin torque in a three-terminal magnetic device.
abstract: A pure spin current generated within a nonlocal spin valve can exert a spin-transfer torque on a nanomagnet. This nonlocal torque enables new design schemes for magnetic memory devices that do not require the application of large voltages across tunnel barriers that can suffer electrical breakdown. Here we report a quantitative measurement of this nonlocal spin torque using spin-torque-driven ferromagnetic resonance. Our measurement agrees well with the prediction of an effective circuit model for spin transport. Based on this model, we suggest strategies for optimizing the strength of nonlocal torque.
authors.affiliation: Cornell University, Ithaca, New York 14853, USA.
authors.forename: Lin
authors.initials: L
authors.lastname: Xue
authors.forename: Chen
authors.initials: C
authors.lastname: Wang
authors.forename: Yong-Tao
authors.initials: YT
authors.lastname: Cui
authors.forename: Luqiao
authors.initials: L
authors.lastname: Liu
authors.forename: A
authors.initials: A
authors.lastname: Swander
authors.forename: J Z
authors.initials: JZ
authors.lastname: Sun
authors.forename: R A
authors.initials: RA
authors.lastname: Buhrman
authors.forename: D C
authors.initials: DC
authors.lastname: Ralph