The random anisotropy model was simulated by micromagnetic calculations performed on a 450 nm × 72 nm × 72 nm computational box, periodic in y and z directions, which consists of iron nanograins. The diminishing of effective anisotropy as a function of grain size was followed through the domain wall width. The domain wall structures have been calculated as a function of average grain sizes 10, 12, 15, 20 nm and for single-crystal, using direct integration of the Landau-Lifshitz-Gilbert equation. The domain wall width was found to increase with 1/D3 as predicted by the Herzer model.
- Nanocrystalline alloy
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics