Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2009.2031083
