title: Nanowire spin torque oscillator driven by spin orbit torques.
abstract: Spin torque from spin current applied to a nanoscale region of a ferromagnet can act as negative magnetic damping and thereby excite self-oscillations of its magnetization. In contrast, spin torque uniformly applied to the magnetization of an extended ferromagnetic film does not generate self-oscillatory magnetic dynamics but leads to reduction of the saturation magnetization. Here we report studies of the effect of spin torque on a system of intermediate dimensionality--a ferromagnetic nanowire. We observe coherent self-oscillations of magnetization in a ferromagnetic nanowire serving as the active region of a spin torque oscillator driven by spin orbit torques. Our work demonstrates that magnetization self-oscillations can be excited in a one-dimensional magnetic system and that dimensions of the active region of spin torque oscillators can be extended beyond the nanometre length scale.
authors.affiliation: Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Duan
authors.affiliation: Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
authors.forename: Andrew
authors.initials: A
authors.lastname: Smith
authors.affiliation: Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
authors.forename: Liu
authors.initials: L
authors.lastname: Yang
authors.affiliation: Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
authors.forename: Brian
authors.initials: B
authors.lastname: Youngblood
authors.affiliation: Helmholtz Zentrum Dresden Rossendorf, D-01328 Dresden, Germany.
authors.forename: Jürgen
authors.initials: J
authors.lastname: Lindner
authors.affiliation: Department of Physics and Center for Nonlinear Science, University of Münster, Corrensstrasse 2-4, 48149 Münster, Germany.
authors.forename: Vladislav E
authors.initials: VE
authors.lastname: Demidov
authors.affiliation: 1] Department of Physics and Center for Nonlinear Science, University of Münster, Corrensstrasse 2-4, 48149 Münster, Germany [2] Institute of Metal Physics, Ural Division of RAS, Yekaterinburg 620041, Russia.
authors.forename: Sergej O
authors.initials: SO
authors.lastname: Demokritov
authors.affiliation: Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
authors.forename: Ilya N
authors.initials: IN
authors.lastname: Krivorotov