Non-reciprocity and exchange-spring delay of domain-wall Walker breakdown in magnetic nanowires with azimuthal magnetization
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| Autores principales: | , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| author | Gómez-Cruz, Lucía Álvaro-Gómez, Laura Fernández-González, Claudia Ruiz-Gómez, Sandra Thirion, Christophe Curci, Giuseppe Aballe, Lucia Pereiro, Eva Belkhou, Rachid Martinez, Eduardo Raposo, Victor Toussaint, Jean-Christophe Gusakova, Daria Masseboeuf, Aurélien Fruchart, Olivier Pérez, Lucas |
| author_facet | Gómez-Cruz, Lucía Álvaro-Gómez, Laura Fernández-González, Claudia Ruiz-Gómez, Sandra Thirion, Christophe Curci, Giuseppe Aballe, Lucia Pereiro, Eva Belkhou, Rachid Martinez, Eduardo Raposo, Victor Toussaint, Jean-Christophe Gusakova, Daria Masseboeuf, Aurélien Fruchart, Olivier Pérez, Lucas |
| contents | Domain wall (DW) motion is a crucial process involved in magnetization reversal, be it under magnetic field or spin-polarized current stimulus. In most cases DW speed does not exceed $\approx$100m/s and collapses above a given threshold of the stimulus, an effect known as Walker breakdown. A few specific material properties have been identified to delay the breakdown of speed by increasing the energy barrier preventing internal precession. We show that in a 3D nanomagnetic system, here with vortex-state domains, the topology of the magnetization distribution may intrinsically and robustly delay the Walker breakdown due to an exchange-spring effect. In addition, curvature induces a major non-reciprocal effect, delaying or not the Walker breakdown depending on the chirality of the azimuthal domain versus the direction of motion of the DW. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_03715 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Non-reciprocity and exchange-spring delay of domain-wall Walker breakdown in magnetic nanowires with azimuthal magnetization Gómez-Cruz, Lucía Álvaro-Gómez, Laura Fernández-González, Claudia Ruiz-Gómez, Sandra Thirion, Christophe Curci, Giuseppe Aballe, Lucia Pereiro, Eva Belkhou, Rachid Martinez, Eduardo Raposo, Victor Toussaint, Jean-Christophe Gusakova, Daria Masseboeuf, Aurélien Fruchart, Olivier Pérez, Lucas Mesoscale and Nanoscale Physics Domain wall (DW) motion is a crucial process involved in magnetization reversal, be it under magnetic field or spin-polarized current stimulus. In most cases DW speed does not exceed $\approx$100m/s and collapses above a given threshold of the stimulus, an effect known as Walker breakdown. A few specific material properties have been identified to delay the breakdown of speed by increasing the energy barrier preventing internal precession. We show that in a 3D nanomagnetic system, here with vortex-state domains, the topology of the magnetization distribution may intrinsically and robustly delay the Walker breakdown due to an exchange-spring effect. In addition, curvature induces a major non-reciprocal effect, delaying or not the Walker breakdown depending on the chirality of the azimuthal domain versus the direction of motion of the DW. |
| title | Non-reciprocity and exchange-spring delay of domain-wall Walker breakdown in magnetic nanowires with azimuthal magnetization |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2603.03715 |