| 摘要 |
PURPOSE:To simplify the constitution and narrow a track and a gap by making the distance between a magnetoresistance effect magneto-sensitive part and one high-permeability magnetic body different between the front side and the rear side to give a required bias magnetic field to the magnetoresistance effect magneto-sensitive part. CONSTITUTION:A magnetoresistance effect magneto-sensitive part 3 is interposed between front ends, which faces each other to constitute a magnetic gap 4, of a pair of high-permeability magnetic bodies 1 and 2 facing each other. The face of the second high-permeability magnetic body 2 facing the magnetoresistance effect magneto-sensitive part 3 is so worked that a magnetic length L between one high-permeability magnetic body 2 and the magnetoresistance effect magneto-sensitive part 3 is different between the front side and the rear side with respect to the magnetic gap though that between the other high-permeability magnetic body 1 and the magnetoresistance effect magneto-sensitive part 3 is uniform. |
