Micromagnetic calculation of the high frequency dynamics of nano-size rectangular ferromagnetic stripes

Nano-size ferromagnetic dots, wires, and stripes are of great interest for future high speed magnetic sensors and ultrahigh density magnetic storage. High frequency dynamic excitation is one way to investigate the time scale of the magnetization reversal in submicron particles with lateral nanometer...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 2001-06, Vol.89 (11), p.7012-7014
Main Authors: Gérardin, O., Le Gall, H., Donahue, M. J., Vukadinovic, N.
Format: Article
Language:English
Subjects:
DISTRIBUTION
EXCITATION
MAGNETIZATION
MATERIALS SCIENCE
PERMALLOY
PHYSICS
RESONANCE
STORAGE
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Nano-size ferromagnetic dots, wires, and stripes are of great interest for future high speed magnetic sensors and ultrahigh density magnetic storage. High frequency dynamic excitation is one way to investigate the time scale of the magnetization reversal in submicron particles with lateral nanometer dimension. Macroscopic models like the Landau–Lifshitz (LL) model are often used to describe the switching process. However, these models do not take into account the nonuniformity of the magnetization structure. In this article dynamic micromagnetic calculations are used in determining the high frequency susceptibility of a 1 μm×50 nm×5 nm Permalloy stripe. The studied structure exhibits two resonance modes. The higher, primary peak is around 10 GHz and can be identified with the uniform resonance mode predicted by the macroscopic LL model. The low frequency peak is attributed to the splay of the magnetization distribution near the end of the stripe.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1360390