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(a) Color inverted RHEED pattern of the Co(10 nm)/Cu(2 nm)/Si(111) surface in the direction of incidence [1-10]. (b) Hysteresis loops of continuous Co film measured in easy and hard directions of magnetization. (c) The azimuthal angular dependence of normalized remanence Mr /Ms (ϕ) of Co film. (d) Height profile and AFM image of the section of the nanostripe with ω = 1800 nm.
The dependences of K shape and K step on the width of the stripes.
(a) moke and oommf simulated hysteresis loops of the nanostripe with ω = 1800 nm. MFM image of the end of the stripe in the (b) remanent state, B = 0, the direction of magnetization in domains is marked by green arrows, (c) near coercive force magnetic field, B = −9 mT, DWs with partial negative polarity are marked by white arrows, (d) almost reversed state with vortices in some DWs, B = −15 mT.
MFM images and micromagnetic simulations of the section of the stripe marked on Fig. 3(b) at different stages of remagnetization. (a) remanent state, DWs are indexed in MFM and simulated images correspondingly (b) vortex nucleation in central DW, B = −9 mT, (c) vortices are in each DW, B = −11 mT, (d) elimination of the vortices, magnetization reversal in the DWs has finished B = −15 mT. Vortices are marked by white arrows. Micromagnetic simulated images are shown in div M coloration.
Micromagnetic modeling of the vortex spin structures in the Neel DWs of part of the stripe.
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