Topological meron-antimeron domain walls and skyrmions in a low-symmetry system
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866916791419142144 |
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| author | Brüning, Reiner Rózsa, Levente Conte, Roberto Lo Kubetzka, André Wiesendanger, Roland von Bergmann, Kirsten |
| author_facet | Brüning, Reiner Rózsa, Levente Conte, Roberto Lo Kubetzka, André Wiesendanger, Roland von Bergmann, Kirsten |
| contents | The generation of topologically non-trivial magnetic configurations has been a pivotal topic in both basic and applied nanomagnetism research. Localized non-coplanar magnetic defects such as skyrmions or merons were found to interact strongly with currents, making them interesting candidates for future spintronics applications. Here, we study a low-symmetry bcc(110) system by spin-polarized scanning tunneling microscopy and an atomistic spin model using parameters obtained from first-principles calculations. We demonstrate how a delicate balance between energy terms generates both topologically trivial and non-trivial domain walls, depending on their crystallographic direction. The topological walls consist of merons and antimerons and the topological charge amounts to about 0.2/nm wall length. The incorporation of holes in the films facilitates the transition from an in-plane ferromagnetic ground state to a spin-spiral state. Both domain walls and spirals transition into isolated elongated magnetic skyrmions in applied magnetic fields, establishing low-symmetry systems as a versatile platform for spin-texture engineering. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_04009 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Topological meron-antimeron domain walls and skyrmions in a low-symmetry system Brüning, Reiner Rózsa, Levente Conte, Roberto Lo Kubetzka, André Wiesendanger, Roland von Bergmann, Kirsten Mesoscale and Nanoscale Physics The generation of topologically non-trivial magnetic configurations has been a pivotal topic in both basic and applied nanomagnetism research. Localized non-coplanar magnetic defects such as skyrmions or merons were found to interact strongly with currents, making them interesting candidates for future spintronics applications. Here, we study a low-symmetry bcc(110) system by spin-polarized scanning tunneling microscopy and an atomistic spin model using parameters obtained from first-principles calculations. We demonstrate how a delicate balance between energy terms generates both topologically trivial and non-trivial domain walls, depending on their crystallographic direction. The topological walls consist of merons and antimerons and the topological charge amounts to about 0.2/nm wall length. The incorporation of holes in the films facilitates the transition from an in-plane ferromagnetic ground state to a spin-spiral state. Both domain walls and spirals transition into isolated elongated magnetic skyrmions in applied magnetic fields, establishing low-symmetry systems as a versatile platform for spin-texture engineering. |
| title | Topological meron-antimeron domain walls and skyrmions in a low-symmetry system |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2411.04009 |