Slow Equilibrium Relaxation in a Chiral Magnet Mediated by Topological Defects
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866912068934828032 |
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| author | Zhang, Chenhao Wu, Yang Chen, Jingyi Jin, Haonan Wang, Jinghui Fan, Raymond Steadman, Paul van der Laan, Gerrit Hesjedal, Thorsten Zhang, Shilei |
| author_facet | Zhang, Chenhao Wu, Yang Chen, Jingyi Jin, Haonan Wang, Jinghui Fan, Raymond Steadman, Paul van der Laan, Gerrit Hesjedal, Thorsten Zhang, Shilei |
| contents | We performed a pump-probe experiment on the chiral magnet Cu$_2$OSeO$_3$ to study the relaxation dynamics of its non-collinear magnetic orders, employing a millisecond magnetic field pulse as the pump and resonant elastic x-ray scattering as the probe. Our findings reveal that the system requires $\sim$0.2 s to stabilize after the perturbation applied to both the conical and skyrmion lattice phase; significantly slower than the typical nanosecond timescale observed in micromagnetics. This prolonged relaxation is attributed to the formation and slow dissipation of local topological defects, such as emergent monopoles. By unveiling the experimental lifetime of these emergent singularities in a non-collinear magnetic system, our study highlights a universal relaxation mechanism in solitonic textures within the slow dynamics regime, offering new insights into topological physics and advanced information storage solutions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_05485 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Slow Equilibrium Relaxation in a Chiral Magnet Mediated by Topological Defects Zhang, Chenhao Wu, Yang Chen, Jingyi Jin, Haonan Wang, Jinghui Fan, Raymond Steadman, Paul van der Laan, Gerrit Hesjedal, Thorsten Zhang, Shilei Mesoscale and Nanoscale Physics Materials Science We performed a pump-probe experiment on the chiral magnet Cu$_2$OSeO$_3$ to study the relaxation dynamics of its non-collinear magnetic orders, employing a millisecond magnetic field pulse as the pump and resonant elastic x-ray scattering as the probe. Our findings reveal that the system requires $\sim$0.2 s to stabilize after the perturbation applied to both the conical and skyrmion lattice phase; significantly slower than the typical nanosecond timescale observed in micromagnetics. This prolonged relaxation is attributed to the formation and slow dissipation of local topological defects, such as emergent monopoles. By unveiling the experimental lifetime of these emergent singularities in a non-collinear magnetic system, our study highlights a universal relaxation mechanism in solitonic textures within the slow dynamics regime, offering new insights into topological physics and advanced information storage solutions. |
| title | Slow Equilibrium Relaxation in a Chiral Magnet Mediated by Topological Defects |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2410.05485 |