Figure 3
From: Magneto-optical imaging of thin magnetic films using spins in diamond
Wide-field quantitative magnetic imaging.
(a) Measured map of the field projection BNV along a particular NV axis, as depicted by the black arrow. A background field of 13.4 mT aligned with the NV axis was applied during the acquisition. The total acquisition time is 24 min. (b) Line cut taken along the dashed line in (a), showing that the magnetic field oscillates with a period of 1.47 μm. (c) Simulated image corresponding to an infinite array of bits with a regular magnetisation sequence 010101. A stand-off distance of 1 μm gives good quantitative agreement with (a). A line cut taken along a track in (c) is also shown in (b) for direct comparison with the experiment.
