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American Physical Society, Physical Review Letters, 10(102), 2009

DOI: 10.1103/physrevlett.102.107201

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Controlled switching of Ńeel caps in flux-closure magnetic dots

Journal article published in 2009 by Fabien Cheynis, Aurélien Masseboeuf ORCID, Olivier Fruchart, Nicolas Rougemaille, Jean-Christophe Toussaint ORCID, Rachid Belkhou, Pascale Bayle-Guillemaud, Alain Marty
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This paper is available in a repository.

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Abstract

While magnetic hysteresis usually considers magnetic domains, the switching of the core of magnetic vortices has recently become an active topic. We considered Bloch domain walls, which are known to display at the surface of thin films flux-closure features called Néel caps. We demonstrated the controlled switching of these caps under a magnetic field, occurring via the propagation of a surface vortex. For this we considered flux-closure states in elongated micron-sized dots, so that only the central domain wall can be addressed, while domains remain unaffected.