title: Current-induced control of spin-wave attenuation.
abstract: The current-induced modification of the attenuation of a propagating spin wave in a magnetic nanowire is studied theoretically and numerically. The attenuation length of spin wave can increase when the spin waves and electrons move in the same direction. It is directly affected by the nonadiabaticity of the spin-transfer torque and thus can be used to estimate the nonadiabaticity. When the nonadiabatic spin torque is sufficiently large, the attenuation length becomes negative, resulting in the amplification of spin waves.
authors.affiliation: Department of Materials Science, Korea University, Seoul 136-701, Korea.
authors.forename: Soo-Man
authors.initials: SM
authors.lastname: Seo
authors.forename: Kyung-Jin
authors.initials: KJ
authors.lastname: Lee
authors.forename: Hyunsoo
authors.initials: H
authors.lastname: Yang
authors.forename: Teruo
authors.initials: T
authors.lastname: Ono