Asymmetric hysteresis of Néel caps in flux-closure magnetic dots

Details Asymmetric hysteresis of Néel caps in flux-closure magnetic dots Asymmetric hysteresis of Néel caps in flux-closure magnetic dots

2009-11-01

arxiv.org/abs/0911.0204v1

IEEE Transactions on Magnetics 46, 6 (2010) 1552

Physics

Condensed Matter

Materials Science

Proceeding for MMM-Intermag 2010 (Washington)

Scientific paper

10.1109/TMAG.2010.2043222

We investigated with XMCD-PEEM magnetic imaging the magnetization reversal processes of N\'eel caps inside Bloch walls in self-assembled, micron-sized Fe(110) dots with flux-closure magnetic state. In most cases the magnetic-dependent processes are symmetric in field, as expected. However, some dots show pronounced asymmetric behaviors. Micromagnetic simulations suggest that the geometrical features (and their asymmetry) of the dots strongly affect the switching mechanism of the N\'eel caps.

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