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(a) AFM and MFM images of the rings in the onion state. (b)–(f) MFM images with a 540DW configuration.
(a) and (d) Signal profiles from the phase-shift images of (b) a 540DW configuration and (c) an isolated HHDW in the circular ring.
(a) Signal profile from the phase-shift image of a 360DW configuration in the MFM image of (b), where the scan height is changed from 150 to 20 nm and a magnified image is shown.
Micromagnetic simulation images of a divergence of magnetization with (a) a 360DW and (b) a 540DW configurations in a Co magnetic wire. (c)–(h) Stray field distributions with variable heights.
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