Micromagnetics of the dynamic susceptibility for coupled Permalloy stripes
- 15 November 2000
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 88 (10) , 5899-5903
- https://doi.org/10.1063/1.1320011
Abstract
The dynamic susceptibility of arrays of narrow Permalloy stripes (9 mm × several μm × 200 nm) has been investigated using a single-coil broadband susceptibility spectrometer. Disagreement is observed between experimental results and the macroscopic Landau-Lifshitz model. This model does not take into account the dipolar interaction between magnetic stripes. We have performed micromagnetic calculations that include these dipolar interactions, and have found the resulting frequency dependence of the dynamic susceptibility in the linear regime to be in good agreement with our experimental data.This publication has 8 references indexed in Scilit:
- Behavior of μMAG standard problem No. 2 in the small particle limitJournal of Applied Physics, 2000
- An improved permeameter for thin film measurements up to 6 GHzJournal of Applied Physics, 1999
- Exchange energy representations in computational micromagneticsPhysica B: Condensed Matter, 1997
- Two-dimensional arrays of magnetic stripes and dots patterned by laser ablationJournal of Applied Physics, 1997
- Control of the resonance frequency of soft ferromagnetic amorphous thin films by strip patterningJournal of Applied Physics, 1997
- A method to measure the complex permeability of thin films at ultra-high frequenciesIEEE Transactions on Magnetics, 1996
- Micromagnetic theory of non-uniform magnetization processes in magnetic recording particlesJournal of Magnetism and Magnetic Materials, 1991
- Spontaneous resonances and universal behavior in ferrimagnets: Effective-medium theoryPhysical Review Letters, 1989