Magnetic gradient and magnetic potential for surface devices in magnetostatic applied to the resolution of inverse problem for closed-loop degaussing computation

International audience; This paper presents the use of magnetic gradient, and magnetic potential measurements in the specific case of magnetisation identification for a thin sheet. A brief description of these notions and the method to calculate them are presented and valideted. These two kinds of measurements are tested for a numerical identification case. Advantages of using induction, magnetic gradient or magnetic potential measurements are then discussed.