Wickenbrock, Arne, Huijie Zheng, Georgios Chatzidrosos, Joseph Shaji Rebeirro, Tim Schneemann, and Peter Blümler. “High Homogeneity Permanent Magnet for Diamond Magnetometry.” Journal of Magnetic Resonance 322 (January 1, 2021): 106867.
https://doi.org/10.1016/j.jmr.2020.106867.
Halbach magnets are a source of homogeneous magnetic field in an enclosed volume while keeping stray fields at a minimum. Here, we present the design, construction, and characterization for a stack of two Halbach rings with 10 cm inner diameter providing a homogeneous (<100 ppm over 1.0×1.0×0.5cm3) magnetic field of around 105 mT, which will be used for a diamond based microwave-free widefield imaging setup. The final characterization is performed with a novel fiberized diamond-based sensor on a 3D translation stage documenting the high homogeneity of the constructed Halbach array and its suitability for the proposed use.