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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2601.07188 |
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| _version_ | 1866917195851759616 |
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| author | Prananto, Dwi Wang, Yifei Kainuma, Yuta Hayashi, Kunitaka Tomitori, Masahiko An, Toshu |
| author_facet | Prananto, Dwi Wang, Yifei Kainuma, Yuta Hayashi, Kunitaka Tomitori, Masahiko An, Toshu |
| contents | Scanning diamond nitrogen-vacancy probe microscopy (SNVM) is an important tool for studying nanoscale condensed-matter phenomena. Ga$^+$-ion-focused-ion-beam (FIB) milling has been introduced as an available method for fabricating SNVM, while the probe diameter is limited to a few micrometers due to the Ga$^+$-induced damage. We report a method for improving the SNVM probes' quality, with an 800-nm diameter probe of ultrapure diamond, through polyvinyl alcohol and Pt/Pd capping, followed by UV/ozone exposure. The effectiveness of the method is confirmed by NVs' spin-coherence property measurements and magnetic domain structure imaging with a few-hundred-nanometer resolution and a 6.7 $μ$T/Hz$^{1/2}$ sensitivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_07188 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Improvement of a focused ion beam fabricated diamond pillar for scanning ensemble nitrogen-vacancy magnetometry probe using an ultrapure diamond Prananto, Dwi Wang, Yifei Kainuma, Yuta Hayashi, Kunitaka Tomitori, Masahiko An, Toshu Materials Science Scanning diamond nitrogen-vacancy probe microscopy (SNVM) is an important tool for studying nanoscale condensed-matter phenomena. Ga$^+$-ion-focused-ion-beam (FIB) milling has been introduced as an available method for fabricating SNVM, while the probe diameter is limited to a few micrometers due to the Ga$^+$-induced damage. We report a method for improving the SNVM probes' quality, with an 800-nm diameter probe of ultrapure diamond, through polyvinyl alcohol and Pt/Pd capping, followed by UV/ozone exposure. The effectiveness of the method is confirmed by NVs' spin-coherence property measurements and magnetic domain structure imaging with a few-hundred-nanometer resolution and a 6.7 $μ$T/Hz$^{1/2}$ sensitivity. |
| title | Improvement of a focused ion beam fabricated diamond pillar for scanning ensemble nitrogen-vacancy magnetometry probe using an ultrapure diamond |
| topic | Materials Science |
| url | https://arxiv.org/abs/2601.07188 |