Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2012.2206820
