title: Strong radiation of spin waves by core reversal of a magnetic vortex and their wave behaviors in magnetic nanowire waveguides.
abstract: We conducted micromagnetic numerical studies on the strong radiation of spin waves (SWs) produced by the magnetic-field-induced reversal of a magnetic vortex core, as well as their wave behaviors in magnetic nanowires. It was found that the radial SWs can be emitted intensively from a vortex core in a circular dot by virtue of localized large torques employed at the core, and then can be injected into a long nanowire via their contact. These SWs exhibit wave characteristics such as propagation, reflection, transmission, interference, and dispersion. These results offer a preview of the generation, delivery, and manipulation of SWs in magnetic elements, which are applicable to information-signal processing in potential SW devices.
authors.affiliation: Research Center for Spin Dynamics & Spin-Wave Devices and Nanospintronics Laboratory, Seoul National University, Seoul 151-744, Republic of Korea.
authors.forename: Sangkook
authors.initials: S
authors.lastname: Choi
authors.forename: Ki-Suk
authors.initials: KS
authors.lastname: Lee
authors.forename: Konstantin Yu
authors.initials: KY
authors.lastname: Guslienko
authors.forename: Sang-Koog
authors.initials: SK
authors.lastname: Kim