Flux focusing with a superconducting nanoneedle for scanning SQUID susceptometry
Abstract A nanofabricated superconducting quantum interference device (nano-SQUID) is a direct and sensitive flux probe used for magnetic imaging of quantum materials and mesoscopic devices. Due to the functionalities of superconductive integrated circuits, nano-SQUIDs fabricated on chips are partic...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Publishing Group
2023-06-01
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| Series: | Microsystems & Nanoengineering |
| Online Access: | https://doi.org/10.1038/s41378-023-00553-9 |
| _version_ | 1827922880123371520 |
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| author | B. K. Xiang S. Y. Wang Y. F. Wang J. J. Zhu H. T. Xu Y. H. Wang |
| author_facet | B. K. Xiang S. Y. Wang Y. F. Wang J. J. Zhu H. T. Xu Y. H. Wang |
| author_sort | B. K. Xiang |
| collection | DOAJ |
| description | Abstract A nanofabricated superconducting quantum interference device (nano-SQUID) is a direct and sensitive flux probe used for magnetic imaging of quantum materials and mesoscopic devices. Due to the functionalities of superconductive integrated circuits, nano-SQUIDs fabricated on chips are particularly versatile, but their spatial resolution has been limited by their planar geometries. Here, we use femtosecond laser 3-dimensional (3D) lithography to print a needle onto a nano-SQUID susceptometer to overcome the limits of the planar structure. The nanoneedle coated with a superconducting shell focused the flux from both the field coil and the sample. We performed scanning imaging with such a needle-on-SQUID (NoS) device on superconducting test patterns with topographic feedback. The NoS showed improved spatial resolution in both magnetometry and susceptometry relative to the planarized counterpart. This work serves as a proof-of-principle for integration and inductive coupling between superconducting 3D nanostructures and on-chip Josephson nanodevices. |
| first_indexed | 2024-03-13T04:49:06Z |
| format | Article |
| id | doaj.art-0459a7c9e8364769b157090063ac36f6 |
| institution | Directory Open Access Journal |
| issn | 2055-7434 |
| language | English |
| last_indexed | 2024-03-13T04:49:06Z |
| publishDate | 2023-06-01 |
| publisher | Nature Publishing Group |
| record_format | Article |
| series | Microsystems & Nanoengineering |
| spelling | doaj.art-0459a7c9e8364769b157090063ac36f62023-06-18T11:16:58ZengNature Publishing GroupMicrosystems & Nanoengineering2055-74342023-06-01911710.1038/s41378-023-00553-9Flux focusing with a superconducting nanoneedle for scanning SQUID susceptometryB. K. Xiang0S. Y. Wang1Y. F. Wang2J. J. Zhu3H. T. Xu4Y. H. Wang5State Key Laboratory of Surface Physics and Department of Physics, Fudan UniversityState Key Laboratory of Surface Physics and Department of Physics, Fudan UniversityState Key Laboratory of Surface Physics and Department of Physics, Fudan UniversityState Key Laboratory of Surface Physics and Department of Physics, Fudan UniversityState Key Laboratory of Surface Physics and Department of Physics, Fudan UniversityState Key Laboratory of Surface Physics and Department of Physics, Fudan UniversityAbstract A nanofabricated superconducting quantum interference device (nano-SQUID) is a direct and sensitive flux probe used for magnetic imaging of quantum materials and mesoscopic devices. Due to the functionalities of superconductive integrated circuits, nano-SQUIDs fabricated on chips are particularly versatile, but their spatial resolution has been limited by their planar geometries. Here, we use femtosecond laser 3-dimensional (3D) lithography to print a needle onto a nano-SQUID susceptometer to overcome the limits of the planar structure. The nanoneedle coated with a superconducting shell focused the flux from both the field coil and the sample. We performed scanning imaging with such a needle-on-SQUID (NoS) device on superconducting test patterns with topographic feedback. The NoS showed improved spatial resolution in both magnetometry and susceptometry relative to the planarized counterpart. This work serves as a proof-of-principle for integration and inductive coupling between superconducting 3D nanostructures and on-chip Josephson nanodevices.https://doi.org/10.1038/s41378-023-00553-9 |
| spellingShingle | B. K. Xiang S. Y. Wang Y. F. Wang J. J. Zhu H. T. Xu Y. H. Wang Flux focusing with a superconducting nanoneedle for scanning SQUID susceptometry Microsystems & Nanoengineering |
| title | Flux focusing with a superconducting nanoneedle for scanning SQUID susceptometry |
| title_full | Flux focusing with a superconducting nanoneedle for scanning SQUID susceptometry |
| title_fullStr | Flux focusing with a superconducting nanoneedle for scanning SQUID susceptometry |
| title_full_unstemmed | Flux focusing with a superconducting nanoneedle for scanning SQUID susceptometry |
| title_short | Flux focusing with a superconducting nanoneedle for scanning SQUID susceptometry |
| title_sort | flux focusing with a superconducting nanoneedle for scanning squid susceptometry |
| url | https://doi.org/10.1038/s41378-023-00553-9 |
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