Numerical Analysis of the Nonlinear Excitation of Subcritical Spin-Wave Modes Within a Micromagnetic Framework

Author

Consolo, Giancarlo ; Finocchio, Giovanni ; Lopez-Diaz, Luis ; Azzerboni, Bruno

Author_Institution

Res. unit of Ferrara, CNISM, Ferrara, Italy

Volume

45

Issue

11

fYear

2009

Firstpage

5220

Lastpage

5223

Abstract

A micromagnetic analysis of the excitation of subcritical bullet modes by spin-polarized currents in magnetic nanocontact systems is carried out by taking into account the contributions arising from Oersted and thermal fields. It is demonstrated that the former yields an increase of the value of the excitation thresholds, whereas the latter represents the source of the nonlinear fluctuations needed to excite such subcritical modes.

Keywords

magnetisation; micromagnetics; nanocontacts; spin waves; Oersted field; bullet modes; excitation threshold; magnetic nanocontact system; magnetization dynamics; micromagnetic framework; nonlinear excitation; nonlinear fluctuations; numerical analysis; spin-polarized current; subcritical spin-wave modes; thermal field; thermal fluctuations; Couplings; Fluctuations; Magnetic anisotropy; Magnetic devices; Magnetic hysteresis; Magnetization; Micromagnetics; Numerical analysis; Perpendicular magnetic anisotropy; Temperature; Micromagnetism; nonlinear magnetization dynamics; spin-waves; thermal fluctuations;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2031083

Filename

5297537