Skyrmion-vortex interactions in chiral-magnet/superconducting hybrid systems
In this thesis, we have performed systematic transport and magnetization studies of the physics arising from the interplay of chiral magnetism and superconductivity in low-dimensional hybrid systems. We combine stacks of Ir/Fe(x)/Co(y)/Pt metallic multilayers with thin superconducting Nb films, whic...
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| Format: | Thesis-Doctor of Philosophy |
| Language: | English |
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Nanyang Technological University
2022
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| Online Access: | https://hdl.handle.net/10356/159298 |
| _version_ | 1811684990459576320 |
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| author | Machain, Paloma |
| author2 | Christos Panagopoulos |
| author_facet | Christos Panagopoulos Machain, Paloma |
| author_sort | Machain, Paloma |
| collection | NTU |
| description | In this thesis, we have performed systematic transport and magnetization studies of the physics arising from the interplay of chiral magnetism and superconductivity in low-dimensional hybrid systems. We combine stacks of Ir/Fe(x)/Co(y)/Pt metallic multilayers with thin superconducting Nb films, which allow us to independently tune each of the magnetic length scales in our heterostructures and hence modulate the interaction strengths between the topological excitations characteristic to each layer. Using a combination of ultra-sensitive magnetization, electrical transport and magnetic imaging techniques, we identify signatures of skyrmion-induced antivortex nucleation phenomena, Meissner screening currents in the superconductor (induced by the chiral spin topology) and antivortex-induced changes in the skyrmion radius. Our work provides the first glimpse of hybrid topological solitons in real space and paves the way to integrating such phenomena in future functional material architectures. |
| first_indexed | 2024-10-01T04:37:24Z |
| format | Thesis-Doctor of Philosophy |
| id | ntu-10356/159298 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:37:24Z |
| publishDate | 2022 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1592982023-02-28T23:41:25Z Skyrmion-vortex interactions in chiral-magnet/superconducting hybrid systems Machain, Paloma Christos Panagopoulos School of Physical and Mathematical Sciences CHRISTOS@ntu.edu.sg Science::Physics In this thesis, we have performed systematic transport and magnetization studies of the physics arising from the interplay of chiral magnetism and superconductivity in low-dimensional hybrid systems. We combine stacks of Ir/Fe(x)/Co(y)/Pt metallic multilayers with thin superconducting Nb films, which allow us to independently tune each of the magnetic length scales in our heterostructures and hence modulate the interaction strengths between the topological excitations characteristic to each layer. Using a combination of ultra-sensitive magnetization, electrical transport and magnetic imaging techniques, we identify signatures of skyrmion-induced antivortex nucleation phenomena, Meissner screening currents in the superconductor (induced by the chiral spin topology) and antivortex-induced changes in the skyrmion radius. Our work provides the first glimpse of hybrid topological solitons in real space and paves the way to integrating such phenomena in future functional material architectures. Doctor of Philosophy 2022-06-14T05:20:04Z 2022-06-14T05:20:04Z 2021 Thesis-Doctor of Philosophy Machain, P. (2021). Skyrmion-vortex interactions in chiral-magnet/superconducting hybrid systems. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/159298 https://hdl.handle.net/10356/159298 en This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). application/pdf Nanyang Technological University |
| spellingShingle | Science::Physics Machain, Paloma Skyrmion-vortex interactions in chiral-magnet/superconducting hybrid systems |
| title | Skyrmion-vortex interactions in chiral-magnet/superconducting hybrid systems |
| title_full | Skyrmion-vortex interactions in chiral-magnet/superconducting hybrid systems |
| title_fullStr | Skyrmion-vortex interactions in chiral-magnet/superconducting hybrid systems |
| title_full_unstemmed | Skyrmion-vortex interactions in chiral-magnet/superconducting hybrid systems |
| title_short | Skyrmion-vortex interactions in chiral-magnet/superconducting hybrid systems |
| title_sort | skyrmion vortex interactions in chiral magnet superconducting hybrid systems |
| topic | Science::Physics |
| url | https://hdl.handle.net/10356/159298 |
| work_keys_str_mv | AT machainpaloma skyrmionvortexinteractionsinchiralmagnetsuperconductinghybridsystems |