Magnetisation reversal dynamics in an ultrathin magnetic film and the creep phenomenon

摘要: The domain structure and magnetisation reversal phenomenon in ultrathin magnetic film structures with perpendicular anisotropy are reviewed. wall motion is studied virgin He ion irradiated Pt/Co(0.5nm)/Pt films. field (H) dependence of the mean velocity v does not follow a trivial Arrhenius law, where Ln (v) proportional to H. At low field, it perfectly interpreted within so-called creep theory as soon moves weak pinning media. analogy between vortices type-II superconductor walls emphasised.