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Institute of Electrical and Electronics Engineers, IEEE Transactions on Magnetics, 6(46), p. 1552-1555, 2010

DOI: 10.1109/tmag.2010.2043222

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Asymmetric Hysteresis of Néel Caps in Flux-Closure Magnetic Dots

Journal article published in 2010 by Olivier Fruchart, Nicolas Rougemaille, Azzedine Bendounan, Jean-Christophe Toussaint ORCID, Rachid Belkhou, Yuan Tian, Yuan Tian, Hyeonseung Yu, Hyeonseung Yu, Fabien Cheynis, Aurélien Masseboeuf ORCID, Pascale Bayle-Guillemaud, Alain Marty
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This paper is available in a repository.

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Abstract

We investigated with XMCD-PEEM magnetic imaging the magnetization reversal processes of Néel 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 Néel caps. ; Comment: Proceeding for MMM-Intermag 2010 (Washington)