Numerical calculation method of shape demagnetization tensor spatially profile for cuboid

Abstract Utilizing the magnetic charge theory, the analytical expressions of the shape demagnetization tensor spatially profile of a cuboid are derived and validated. The expressions can accurately calculate the shape demagnetization factors in three orthogonal directions for a given point in the magnetic rectangular body. The shape demagnetization tensor spatially profile is the function of the positions and dimension ratios and is independent of the material permeability. The expressions are of significant convenience for analyzing the demagnetization and designing and optimizing a cuboid.