Magnetoresistance sensor magnetically coupled with high-coercive force film at two end regions

A magnetoresistance sensor for detecting a magnetic field on the basis of a change in electric resistance of a magnetoresistance layer, comprising a substrate, said magnetoresistance layer, a high-coercive-force film for stabilizing magnetization of said magnetoresistance layer, and a conductive layer formed on said magnetoresistance layer or said high-coercive-force film,

• wherein a magnetic insulating layer is arranged between said magnetoresistance layer and said high-coercive-force film, and an end face of said magnetic insulating layer has a tapered surface.

A magnetoresistance sensor for detecting a magnetic field on the basis of a change in electric resistance of a magnetoresistance layer, comprising:

• a magnetic insulating island layered on an active region of the magnetoresistance layer;
• a high-coercive-force film layered on the magnetic insulating island and in direct contact with a non-active region of the magnetoresistance layer such that the high-coercive-film is magnetically coupled with the magnetoresistance layer, creating a longitudinal bias in the non-active region of the magnetoresistance layer, and fully suppressing any magnetic field leakage where the active-region meets the non-active region.