Nonlinear magnetic vortex dynamics in a circular nanodot excited by spin-polarized current
| Data(s) |
24/11/2015
24/11/2015
08/08/2014
|
|---|---|
| Resumo |
We investigate analytically and numerically nonlinear vortex spin torque oscillator dynamics in a circular magnetic nanodot induced by a spin-polarized current perpendicular to the dot plane. We use a generalized nonlinear Thiele equation including spin-torque term by Slonczewski for describing the nanosize vortex core transient and steady orbit motions and analyze nonlinear contributions to all forces in this equation. Blue shift of the nano-oscillator frequency increasing the current is explained by a combination of the exchange, magnetostatic, and Zeeman energy contributions to the frequency nonlinear coefficient. Applicability and limitations of the standard nonlinear nano-oscillator model are discussed. |
| Identificador |
Nanoscale Research Letters 9 2014 : (2014) // Article ID 386 1556-276X http://hdl.handle.net/10810/16163 10.1186/1556-276X-9-386 |
| Idioma(s) |
eng |
| Publicador |
Springer International Publishing |
| Relação |
http://www.nanoscalereslett.com/content/9/1/386/abstract |
| Direitos |
© 2014 Guslienko et al.; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. info:eu-repo/semantics/openAccess |
| Palavras-Chave | #magnetic nanodot #nano-oscillator #vortex #spin torque transfer #excitation #driven |
| Tipo |
info:eu-repo/semantics/article |
