Calculates field according to https://www.sciencedirect.com/science/article/pii/S0304885317334662 Journal of Magnetism and Magnetic Materials Volume 456, 15 June 2018, Pages 423-432 "Exact expression for the magnetic field of a finite cylinder with arbitrary uniform magnetization" Alessio Caciagli, Roel J. Baars, Albert P.Philipse, Bonny W. M. Kuipers
Used for calculating the field above a thin magnetized foil, with scans conducted along axes.
Foil magnetization is along x direction.