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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2014

Observation of Bloch-point domain walls in cylindrical magnetic nanowires

Sandrine da Col
  • Fonction : Auteur
  • PersonId : 888494
Nicolas Rougemaille
  • Fonction : Auteur
  • PersonId : 921409
T.O. Mentes
  • Fonction : Auteur
Michael Darques
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  • PersonId : 888495
Laurent Cagnon
Jean-Christophe Toussaint
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  • PersonId : 921410
Olivier Fruchart

Résumé

Topological protection is an elegant way of warranting the integrity of quantum and nanosized systems. In magnetism one example is the Bloch-point, a peculiar object implying the local vanishing of magnetization within a ferromagnet. Its existence had been postulated and described theoretically since several decades, however it has never been observed. We con rm experimentally the existence of Bloch points, imaged within domain walls in cylindrical magnetic nanowires, combining surface and transmission XMCD-PEEM magnetic microscopy. This opens the way to the experimental search for peculiar phenomena predicted during the motion of Bloch-point-based domain walls.
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Dates et versions

hal-00911025 , version 1 (28-11-2013)

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Sandrine da Col, Ségolène Jamet, Nicolas Rougemaille, Andrea Locatelli, T.O. Mentes, et al.. Observation of Bloch-point domain walls in cylindrical magnetic nanowires. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2014, 89 (18), pp.180405. ⟨10.1103/PhysRevB.89.180405⟩. ⟨hal-00911025⟩

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