MAGNETIC SENSOR
First Claim
1. a first electrode;
- a second electrode which is provided apart from the first electrode;
a magneto-resistive effect element having a length in a first direction along a film surface of the magneto-resistive effect element which is larger than a length in a second direction along the film surface and perpendicular to the first direction, the magneto-resistive effect element including a first magnetic layer, a non-magnetic layer and a second magnetic layer, the magnetization direction of the first magnetic layer being along the first direction, further the magneto-resistive effect element being connected electrically to the first electrode and the second electrode;
an insulating layer provided between the first electrode and the magneto-resistive effect element;
a current source-portion which is connected to the first electrode and the second electrode and for supplying an alternating current to the magneto-resistive effect element;
a detecting portion which can detect a second harmonic component in an output signal of the magneto -resistive effect element, whereinthe first electrode and the magneto-resistive effect element overlap each other in a third direction perpendicular to the first and the second directions so as to extend along each other.
1 Assignment
0 Petitions
Accused Products
Abstract
In one embodiment, a magnetic sensor has first and second electrode, a magneto-resistive effect element, an insulating layer between the first electrode and the element, a current source portion and a detecting portion. The element has a length in a first direction along a film surface of the element which is larger than that in a second direction along the film surface and perpendicular to the first direction. The element includes first, non-magnetic and second magnetic layers. The magnetization direction of the first magnetic layer is along the first direction. The element is connected to the first and second electrodes. The current source portion is connected to the first and second electrodes. The detecting portion can detect a second harmonic component in an output signal of the element. The first electrode and the element overlap each other in a third direction perpendicular to the first and the second directions.
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Citations
16 Claims
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1. a first electrode;
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a second electrode which is provided apart from the first electrode; a magneto-resistive effect element having a length in a first direction along a film surface of the magneto-resistive effect element which is larger than a length in a second direction along the film surface and perpendicular to the first direction, the magneto-resistive effect element including a first magnetic layer, a non-magnetic layer and a second magnetic layer, the magnetization direction of the first magnetic layer being along the first direction, further the magneto-resistive effect element being connected electrically to the first electrode and the second electrode; an insulating layer provided between the first electrode and the magneto-resistive effect element; a current source-portion which is connected to the first electrode and the second electrode and for supplying an alternating current to the magneto-resistive effect element; a detecting portion which can detect a second harmonic component in an output signal of the magneto -resistive effect element, wherein the first electrode and the magneto-resistive effect element overlap each other in a third direction perpendicular to the first and the second directions so as to extend along each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification