Scanning nitrogen-vacancy center magnetometry in large in-plane magnetic fields

• URL: http://arxiv.org/abs/2201.06450v2
• Date: Wed, 19 Jan 2022 14:21:19 GMT
• Title: Scanning nitrogen-vacancy center magnetometry in large in-plane magnetic fields
• Authors: P. Welter, J. Rhensius, A. Morales, M. S. W\"ornle, C.-H. Lambert, G. Puebla-Hellmann, P. Gambardella, and C. L. Degen
• Abstract summary: We report fabrication of scanning diamond probes from 110-cut diamond where the spin anisotropy axis lies in the scan plane. We show that these probes retain their sensitivity in large in-plane fields and demonstrate scanning magnetometry of the domain pattern of Co-NiO films in applied fields up to 40 mT.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Scanning magnetometry with nitrogen-vacancy (NV) centers in diamond has emerged as a powerful microscopy for studying weak stray field patterns with nanometer resolution. Due to the internal crystal anisotropy of the spin defect, however, external bias fields -- critical for the study of magnetic materials -- must be applied along specific spatial directions. In particular, the most common diamond probes made from {100}-cut diamond only support fields at an angle of $\theta = 55^\circ$ from the surface normal. In this paper, we report fabrication of scanning diamond probes from {110}-cut diamond where the spin anisotropy axis lies in the scan plane ($\theta=90^\circ$). We show that these probes retain their sensitivity in large in-plane fields and demonstrate scanning magnetometry of the domain pattern of Co-NiO films in applied fields up to 40 mT. Our work extends scanning NV magnetometry to the important class of materials that require large in-plane fields.

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