Proposal for a Standard Micromagnetic Problem: Spin Wave Dispersion in a Magnonic Waveguide

Author

Venkat, G. ; Kumar, D. ; Franchin, M. ; Dmytriiev, O. ; Mruczkiewicz, M. ; Fangohr, H. ; Barman, A. ; Krawczyk, M. ; Prabhakar, A.

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol., Chennai, Chennai, India

Volume

49

Issue

1

fYear

2013

fDate

Jan. 2013

Firstpage

524

Lastpage

529

Abstract

In this paper, we propose a standard micromagnetic problem, of a nanostripe of permalloy. We study the magnetization dynamics and describe methods of extracting features from simulations. Spin wave dispersion curves, relating frequency and wave vector, are obtained for wave propagation in different directions relative to the axis of the waveguide and the external applied field. Simulation results using both finite element (Nmag) and finite difference (OOMMF) methods are compared against analytic results, for different ranges of the wave vector.

Keywords

Permalloy; finite difference methods; finite element analysis; magnetisation; magnons; micromagnetics; spin waves; wave propagation; waveguides; FeNi; external applied field; finite difference method; finite element method; magnetization dynamics; magnonic waveguide; micromagnetic problem; permalloy nanostripe; spin wave dispersion curves; wave propagation; wave vector; waveguide axis; Dispersion; Geometry; Magnetization; Mathematical model; Micromagnetics; Standards; Surface waves; Computational micromagnetics; exchange dominated spin waves; spin wave dispersion;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2012.2206820

Filename

6228538