PURPOSE: To prevent drop in detection sensitivity due to inversion of magnetization of a plurality of ferromagnetic thin film stripes constituting a magneto- resistance effect element with respect to an initial direction during repetitive operation from occurring, ragarding a magnetic sensor comprising the magneto- resistance effect element.
CONSTITUTION: A magneto-resistance effect element 2 is provided at a position shifted from the center of a magnetic pole face of a cylindrical magnet 1, preferably at a position in the direction shifted perpendicularly to a direction of movement of a magnetic object 3 to be detected. By this arrangement, a bias magnetic field parallel to the shifted direction to the magneto-resistance effect element 2 is applied, so that magnetization of all of a plurality of ferromagnetic thin film stripes constituting the magneto-resistance effect element 2 is directed in the the same direction. Therefore, even if an external magnetic field is repetitively applied, no inversion in magnetization occurs, thereby stabilizing detection sensitivity.
SHIMIZU SHINKICHI
KURASHIMA SHIGEMI
KAWAMOTO MIEKO
KAJITANI HIROSHI
TANJI SHIGEO
