Picosecond localization dynamics following ultrafast nanoscale magnetic switching
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arXiv
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| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| author | Metternich, Daniel Schneider, Michael Mercurio, Giuseppe Hegstad, Torstein Möller, Marcel Battistelli, Riccardo Klose, Christopher Wittrock, Steffen Patra, Manas R. Joy, Krishnanjana Puzhekadavil Deinhart, Victor Petz, Sascha Prokes, Karel Wintz, Sebastian Weigand, Markus Engel, Wolfgang-Dietrich Sidiropoulos, Themistoklis Will, Ingo Eisebitt, Stefan Carley, Robert E. Mercadier, Laurent Schlappa, Justine Teichmann, Martin Scherz, Andreas Zayko, Sergey Sorokin, Boris V. Bagschik, Kai Ropers, Claus Mentink, Johan H. Pfau, Bastian Büttner, Felix |
| author_facet | Metternich, Daniel Schneider, Michael Mercurio, Giuseppe Hegstad, Torstein Möller, Marcel Battistelli, Riccardo Klose, Christopher Wittrock, Steffen Patra, Manas R. Joy, Krishnanjana Puzhekadavil Deinhart, Victor Petz, Sascha Prokes, Karel Wintz, Sebastian Weigand, Markus Engel, Wolfgang-Dietrich Sidiropoulos, Themistoklis Will, Ingo Eisebitt, Stefan Carley, Robert E. Mercadier, Laurent Schlappa, Justine Teichmann, Martin Scherz, Andreas Zayko, Sergey Sorokin, Boris V. Bagschik, Kai Ropers, Claus Mentink, Johan H. Pfau, Bastian Büttner, Felix |
| contents | Ultrashort laser pulses provide the fastest known way to switch magnetic order. Such excitation commonly creates nanometer-scale domains, even after homogeneous illumination when the position of nucleated domains is not externally defined. However, the physics of domain localization during such ultrafast phase transitions remains unresolved. Here, we use shot-resolved pump-probe resonant x-ray scattering together with a material featuring a periodically modulated magnetic anisotropy landscape to track, in real time, the laser-driven nucleation and localization of nanometer-scale spin textures. We find that nucleation and localization are two distinct processes. Nucleation occurs homogeneously via fluctuations at early times, whereas spatially periodic structures emerge only later and, under suitable conditions, localize in less than one nanosecond. Real-space simulations show that this localization is governed by strong lateral variations in spin-texture lifetimes. Our results demonstrate that ultrafast phase-transition dynamics fundamentally differ from conventional transitions, yet still can be controlled through moderate nanometer-scale tailoring of the energy landscape. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_17643 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Picosecond localization dynamics following ultrafast nanoscale magnetic switching Metternich, Daniel Schneider, Michael Mercurio, Giuseppe Hegstad, Torstein Möller, Marcel Battistelli, Riccardo Klose, Christopher Wittrock, Steffen Patra, Manas R. Joy, Krishnanjana Puzhekadavil Deinhart, Victor Petz, Sascha Prokes, Karel Wintz, Sebastian Weigand, Markus Engel, Wolfgang-Dietrich Sidiropoulos, Themistoklis Will, Ingo Eisebitt, Stefan Carley, Robert E. Mercadier, Laurent Schlappa, Justine Teichmann, Martin Scherz, Andreas Zayko, Sergey Sorokin, Boris V. Bagschik, Kai Ropers, Claus Mentink, Johan H. Pfau, Bastian Büttner, Felix Mesoscale and Nanoscale Physics Ultrashort laser pulses provide the fastest known way to switch magnetic order. Such excitation commonly creates nanometer-scale domains, even after homogeneous illumination when the position of nucleated domains is not externally defined. However, the physics of domain localization during such ultrafast phase transitions remains unresolved. Here, we use shot-resolved pump-probe resonant x-ray scattering together with a material featuring a periodically modulated magnetic anisotropy landscape to track, in real time, the laser-driven nucleation and localization of nanometer-scale spin textures. We find that nucleation and localization are two distinct processes. Nucleation occurs homogeneously via fluctuations at early times, whereas spatially periodic structures emerge only later and, under suitable conditions, localize in less than one nanosecond. Real-space simulations show that this localization is governed by strong lateral variations in spin-texture lifetimes. Our results demonstrate that ultrafast phase-transition dynamics fundamentally differ from conventional transitions, yet still can be controlled through moderate nanometer-scale tailoring of the energy landscape. |
| title | Picosecond localization dynamics following ultrafast nanoscale magnetic switching |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2512.17643 |