Magnetic sensor using tunnel resistance to detect an external magnetic field
First Claim
1. A magnetic sensor comprising:
- a first magnetic layer having an axis of easy magnetization in a first direction;
a second magnetic layer having an axis of easy magnetization in a second direction different from the first direction;
a third magnetic layer positioned between the first magnetic layer and the second magnetic layer, and having a smaller coercive force than the first magnetic layer and the second magnetic layer;
a first insulating layer interposed between the first magnetic layer and third magnetic layer; and
a second insulating layer interposed between the second magnetic layer and the third magnetic layer;
wherein an external magnetic field is detected by the use of tunnel resistance between the first magnetic layer and the third magnetic layer and tunnel resistance between the second magnetic layer and the third magnetic layer.
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Abstract
A magnetic sensor including a first magnetic layer having an axis of easy magnetization in a first direction; a second magnetic layer having an axis of easy magnetization in a second direction different from the first direction; a third magnetic layer positioned between the first magnetic layer and the second magnetic layer, and having a smaller coercive force than the first magnetic layer and the second magnetic layer; a first insulating layer interposed between the first magnetic layer and the third magnetic layer; and a second insulating layer interposed between the second magnetic layer and the third magnetic layer. An external magnetic field is detected by the use of tunnel resistance between the first magnetic layer and the third magnetic layer and tunnel resistance between the second magnetic layer and the third magnetic layer.
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Citations
6 Claims
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1. A magnetic sensor comprising:
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a first magnetic layer having an axis of easy magnetization in a first direction; a second magnetic layer having an axis of easy magnetization in a second direction different from the first direction; a third magnetic layer positioned between the first magnetic layer and the second magnetic layer, and having a smaller coercive force than the first magnetic layer and the second magnetic layer; a first insulating layer interposed between the first magnetic layer and third magnetic layer; and a second insulating layer interposed between the second magnetic layer and the third magnetic layer; wherein an external magnetic field is detected by the use of tunnel resistance between the first magnetic layer and the third magnetic layer and tunnel resistance between the second magnetic layer and the third magnetic layer. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification