| 摘要 |
PURPOSE:To make Barkhausen jump noise small by covering surface of a rectangular magneto-resistance effect element with plural beltlike ferromagnetic thin films of high coercive force in parallel and oblique in longitudinal direction. CONSTITUTION:Magnetic coupling force (called ferromagnetic exchange coupling) that tends to make mutal magnetization parallel is generated at a place where a CoP electrodeposited film 12 is directly covered on a thin ''Permalloy'' film to become a composite film, and the composite film acts as a whole as a magnetic thin film of high coercive force. Consequently, magnetization of the part of composite film does not move even when a signal magnetic field is given. In a place (13 MR segment) where the thin ''Permalloy'' film exposes, the ratio d/q, where d is the width and q is the length of the segment, can be made sufficiently smaller than ''1''. By this processing, magnetic domain breakup becomes difficult in MR segment 13 and behaves as single magnetic domain. As the part of composite film between MR segment 13 and MR segment 13 becomes a hard film, each Mr segment 13, 13- acts as an independent soft film. |
