Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1801466 | Journal of Magnetism and Magnetic Materials | 2010 | 5 Pages |
Abstract
We demonstrate the role of spin-polarized current pulse in activating only a subset of spin-wave normal modes in laterally confined magnetic systems. In order to derive selection rules based on geometrical considerations, the study was carried out by comparing the results of two different micromagnetic frameworks (a classical finite-difference time-domain scheme and the dynamical matrix method) and considering nanopillar devices of elliptical and circular cross-sections in different magnetic ground states (onion, S, and vortex states). The analogies and the differences existing between the mode activation process driven by spin-torque and that obtained by a magnetic field pulse are also addressed.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Federico Montoncello, Loris Giovannini, Fabrizio Nizzoli, Roberto Zivieri, Giancarlo Consolo, Gianluca Gubbiotti,