Computation of Resonant Modes and Frequencies for Saturated Ferromagnetic Nanoparticles

Author

Aquino, Massimiliano D. ; Serpico, Claudio ; Miano, Giovanni ; Bertotti, Giorgio

Author_Institution

Dept. of Technol., Univ. of Naples Parthenope, Naples

Volume

44

Issue

11

fYear

2008

Firstpage

3141

Lastpage

3144

Abstract

The free oscillations of a micromagnetic system around a saturated equilibrium are considered. Magnetization dynamics is described by the Landau-Lifshitz-Gilbert (LLG) equation. The LLG equation is linearized around the equilibrium and put in the form of a generalized eigenvalue problem for suitable self-adjoint operators connected to the micromagnetic effective field. The spectral properties of this problem are studied. The spatial discretization of the problem is analyzed and numerical computation of the resonant oscillations for a magnetic thin-film are performed.

Keywords

eigenvalues and eigenfunctions; ferromagnetic resonance; ferromagnetism; magnetic particles; magnetic thin films; magnetisation; micromagnetics; nanoparticles; oscillations; LLG equation; Landau-Lifshitz-Gilbert equation; ferromagnetic resonance; generalized eigenvalue problem; magnetic thin-film; magnetization dynamics; micromagnetic effective field; micromagnetic system; numerical computation; resonant modes; resonant oscillations; saturated ferromagnetic nanoparticle; self-adjoint operators; spectral properties; Ferromagnetic resonance; generalized eigenvalue problem; normal modes; resonant frequencies;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2008.2001602

Filename

4674581