DEVICE AND METHOD FOR DETECTING MAGNETIC INHOMOGENEITY IN FERROMAGNETIC MATERIAL

摘要

One aspect of the invention relates to a device (10) for detecting a magnetic inhomogeneity in a ferromagnetic material comprising: - a first barrier layer of oxidized material (10_B) extending substantially along a reference plane (Ref) and suitable to be arranged in contact with at least a part of a layer (F) of the ferromagnetic material; a first layer (10_N) of a non-ferromagnetic material deposited on the first barrier layer (10_B) and extending substantially parallel to the reference plane; means for applying a current traversing substantially perpendicularly to the reference plane Ref (Ref) the stack formed by the layer (F) of the ferromagnetic material, the first barrier layer (10_B) and the first layer (10_N) of a material not ferromagnetic; means for measuring the electrical resistance of said stack.