Minimizing the deformation of a static magnetic field by the presence of a ferromagnetic body

Using boundary element methods, it is shown how linear and nonlinear single-valued, reversible magnetization of a body can deform a uniform magnetic field. Soft magnetic materials with a small amount of remanence were investigated. As the relative magnetic permeability of the linear magnetization of the materials increased, the deformation of the uniform magnetic field decreased because of the increase of the demagnetizing field. The deformation of the uniform field by nonlinear magnetization decreased with increasing impressed uniform fields. Use of a Preisach model will enable the evaluation of the impact of irreversible magnetization on the deformation of the uniform magnetic field and will enable methods to minimize this deformation