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Corners and nucleation in micromagnetics1 Presented at the ICM'97 in Cairns, Australia.1

Authors
Journal
Journal of Magnetism and Magnetic Materials
0304-8853
Publisher
Elsevier
Publication Date
Volume
183
Issue
3
Identifiers
DOI: 10.1016/s0304-8853(97)01086-x
Keywords
  • Switching Field
  • Nucleation Field
  • Coercivity
  • Micromagnetic Simulation

Abstract

Abstract The divergence of the stray field in corners and its consequence for micromagnetic calculations was studied numerically in two dimensions for high-anisotropy materials. The results show that no atomistic theory has to be invoked because the singularity is smoothed out already within micromagnetics. The magnetic configurations and its deduced critical quantity, the coercivity, are determined correctly if the configurations are well approximated on the exchange length A/K d . The singularity in the stray field remains only visible in the torque balance where it is compensated by an exchange torque.

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