| 摘要 |
<p>Disclosed is a magnetic sensor wherein elements are disposed such that amplification and magnetic shield effects due to a soft magnetic body are maintained and that an increase of element size due to extending portion of the soft magnetic body can be suppressed. In the magnetic sensor (20), each of the magnetoresistive effect elements (A, B, C, D) has a plurality of element sections (21), which are disposed in the element width direction at intervals, and a plurality of soft magnetic bodies (23, 24), which are alternately disposed with the element sections (21) in the element width direction of the element section (21). The element section (21) has a fixed magnetic layer (34) wherein the magnetization direction is fixed, and a free magnetic layer (36), which is laminated on the fixed magnetic layer (34) with a nonmagnetic layer (35) therebetween, and which changes the magnetization direction when an external magnetic field is applied. The soft magnetic bodies (23, 24) respectively have the extending portions (23a-23c, 24a-24c) that extend in the element length direction from both the ends of each element section (21). The soft magnetic bodies (23, 24) are shared by the magnetoresistive effect elements disposed adjacent to each other in the element length direction of the element section (21).</p> |
