Modern fast-cooled soft magnetic materials are finding ever-widening application in fluxgate-based magnetic field sensors. Nanocrystalline cores feature distinctly better magnetic parameters and supplant permalloy-made cores used to date. The sensor core has a ring form of special design, which makes it possible to magnetize selected core portions, and is made of Finemet type nanocrystalline material. In the paper the design, basic parameters and results of tests carried out on the sensor are presented.
"Magnetic field sensor with a nanocrystalline core", Proc. SPIE 6348, Optoelectronic and Electronic Sensors VI, 634805 (20 October 2006); doi: 10.1117/12.721035; https://doi.org/10.1117/12.721035