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

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.

6 pages, 3 figures

References in corpus (8)

• Probing magnetism in 2D materials at the nanoscale with single spin microscopy
• Real-space imaging of non-collinear antiferromagnetic order with a single spin magnetometer
• Purely Antiferromagnetic Magnetoelectric Random Access Memory
• The nature of domain walls in ultrathin ferromagnets revealed by scanning nanomagnetometry
• Photonic nano-structures on (111) oriented diamond
• Characterization of room-temperature in-plane magnetization in thin flakes of CrTe${}_2$ with a single spin magnetometer
• (111)-oriented, single crystal diamond tips for nanoscale scanning probe imaging of out-of-plane magnetic fields
• Current-induced fragmentation of antiferromagnetic domains

Cited by in corpus (1)

• Scanning nitrogen-vacancy magnetometry down to 350mK