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26 April 2024

» arxiv » 0911.0204

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Asymmetric hysteresis of N'eel caps in flux-closure magnetic dots
Olivier Fruchart ; Nicolas Rougemaille ; Azzedine Bendounan ; Jean-Christophe Toussaint ; Rachid Belkhou ; Yuan Tian ; Hyeonseung Yu ; Fabien Cheynis ; Aurélien Masseboeuf ; Pascale Bayle-Guillemaud ; Alain Marty ;
Date:	1 Nov 2009
Abstract:	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.
Source:	arXiv, 0911.0204
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