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A 2.5D micromagnetic modeling approach for magnetic domain and domain wall studies
Author(s) -
Van de Wiele Ben,
Vansteenkiste Arne,
Van Waeyenberge Bartel,
Dupré Luc,
De Zutter Daniel
Publication year - 2013
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.1953
Subject(s) - magnetization , micromagnetics , discretization , anisotropy , domain wall (magnetism) , condensed matter physics , domain (mathematical analysis) , physics , magnetic domain , magnetic field , statistical physics , mathematical analysis , mathematics , optics , quantum mechanics
SUMMARY We describe how a 2.5D approach can be successfully applied to micromagnetic simulations in which the magnetization dynamics is computed on the nanometer scale. In this approach, an infinitely long geometry is treated enabling a 2D spatial discretization. The material properties and field quantities are invariant in the infinite direction but retain their 3D vector character, safeguarding a correct physical description of the magnetization processes. As an example, we apply the 2.5D approach to investigate the equilibrium domain configurations and domain wall types encountered in infinite magnetic strips with varying cross‐sectional dimension (4D × D) and a varying uniaxial anisotropy strength K u , imposed along the infinite direction. For each considered point in the parameter space D − K u , the equilibrium state is computed by relaxing the micromagnetic system starting from four different initial magnetization states. On the basis of these simulations, we can distinguish three different regions, dominated by the anisotropic, magnetostatic, and exchange interactions. Copyright © 2013 John Wiley & Sons, Ltd.