Fig. 1: Cryogenic scanning magnetometry with a single NV center in the diamond tip.
From: Magnetic domains and domain wall pinning in atomically thin CrBr3 revealed by nanoscale imaging

a Schematic of the experiment. The stray magnetic field of the CrBr3 bilayer is measured using a single NV center in a diamond probe attached to the tuning fork of the AFM. The system is placed in a liquid helium bath cryostat to maintain a temperature <5 K during the measurement. b, c A typical topography image of the measured area and the step at the edge of the sample, respectively. The scale bar is 1 μm. d Measurement sequence of the pulsed optically detected magnetic resonance (ODMR).