Development of a compact magnet for applying a highly uniform magnetic field to a diamond magnetic sensor by inverse problem analysis

We propose a novel method based on the inverse problem approach to optimize shape of magnet generates high uniformity magnetic fields in magnetometer with diamond nitrogen-vacancy (NV) centers. Our original can determine combination moments required design unique shape. obtained small (optimized model, 15 × 25 mm3 and mm3) for integrated magnetometry system improved from 83.6% 99.0% NV centers area (X = −1–1 mm, Y Z 5–6 mm). The results indicate highly sensitive center future biomedical applications.