Author
Listed:
- Sandra Ruiz-Gómez
(Max Planck Institute for Chemical Physics of Solids
Cerdanyola del Valles)
- Claas Abert
(University of Vienna
University of Vienna)
- Pamela Morales-Fernández
(Max Planck Institute for Chemical Physics of Solids)
- Claudia Fernández-González
(Max Planck Institute for Chemical Physics of Solids
Cerdanyola del Valles)
- Sabri Koraltan
(Cerdanyola del Valles
University of Vienna
University of Vienna)
- Lukas Danesi
(University of Vienna
University of Vienna)
- Dieter Suess
(University of Vienna
University of Vienna)
- María Varela
(Universidad Complutense de Madrid)
- Gabriel Sánchez-Santolino
(Universidad Complutense de Madrid)
- Núria Bagués
(Cerdanyola del Valles)
- Michael Foerster
(Cerdanyola del Valles)
- Miguel Ángel Niño
(Cerdanyola del Valles)
- Anna Mandziak
(SOLARIS Synchrotron light Sources)
- Dorota Wilgocka-Ślęzak
(PAC)
- Pawel Nita
(SOLARIS Synchrotron light Sources
Jagiellonian University)
- Markus Koenig
(Max Planck Institute for Chemical Physics of Solids)
- Sebastian Seifert
(Max Planck Institute for Chemical Physics of Solids)
- Aurelio Hierro-Rodriguez
(Universidad de Oviedo
CINN (CSIC-Universidad de Oviedo)
University of Glasgow)
- Amalio Fernández-Pacheco
(TU Wien)
- Claire Donnelly
(Max Planck Institute for Chemical Physics of Solids
Hiroshima University)
Abstract
Topological defects, or singularities, play a key role in the statics and dynamics of complex systems. In magnetism, Bloch point singularities represent point defects that mediate the nucleation of textures such as skyrmions and hopfions. While these textures are typically stabilised in chiral magnets, the influence of chirality and symmetry breaking on Bloch point singularities remains relatively unexplored. Here, we harness advanced three-dimensional nanofabrication to explore the influence of symmetry breaking on Bloch point textures by introducing controlled nano-curvature in a ferromagnetic nanowire. Combining X-ray magnetic microscopy with the application of in situ magnetic fields, we demonstrate that Bloch point singularity-containing domain walls are stabilised in straight regions of the sample, and determine that curvature can be used to tune the energy landscape of the Bloch points. Not only are we able to pattern pinning points but, by controlling the gradient of curvature, we define asymmetric potential wells to realise a robust Bloch point texture shift-register with non-reciprocal behaviour. These insights into the influence of symmetry on singularities offer a route to the controlled nucleation and propagation of topological textures, providing opportunities for logic and computing devices.
Suggested Citation
Sandra Ruiz-Gómez & Claas Abert & Pamela Morales-Fernández & Claudia Fernández-González & Sabri Koraltan & Lukas Danesi & Dieter Suess & María Varela & Gabriel Sánchez-Santolino & Núria Bagués & Micha, 2025.
"Tailoring the energy landscape of a bloch point domain wall with curvature,"
Nature Communications, Nature, vol. 16(1), pages 1-10, December.
Handle:
RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-62705-x
DOI: 10.1038/s41467-025-62705-x
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