CA2576974A1 - Magnetic sensor, production process of the magnetic sensor and magnetic array suitable for the production process - Google Patents
Magnetic sensor, production process of the magnetic sensor and magnetic array suitable for the production process Download PDFInfo
- Publication number
- CA2576974A1 CA2576974A1 CA002576974A CA2576974A CA2576974A1 CA 2576974 A1 CA2576974 A1 CA 2576974A1 CA 002576974 A CA002576974 A CA 002576974A CA 2576974 A CA2576974 A CA 2576974A CA 2576974 A1 CA2576974 A1 CA 2576974A1
- Authority
- CA
- Canada
- Prior art keywords
- free layer
- magnet
- magnetic field
- magnetic sensor
- magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The present invention aims to provide a magnetic sensor provided with a magnetoresistive effect element capable of stably maintaining a direction of magnetization in a magnetic domain of a free layer.
The magnetic sensor includes a mangetoresistive effect element provided with narrow zonal portions including a pinned layer and a free layer.
Disposed below both ends of the free layer are bias magnet films composed of a permanent magnet that applies to the free layer a bias magnetic field in a predetermined direction and an initializing coil 31 that is disposed in the vicinity of the free layer and applies to the free layer a magnetic field having the direction same as that of the bias magnetic field by being energized under a predetermined condition. Further, magnetizing the bias magnet films and fixing the direction of magnetization of the pinned layer are performed by a magnetic field formed by a magnet array configured such that plural permanent magnets are arranged on a lattice point of a tetragonal lattice and a polarity of a magnet pole of each permanent magnet is different from a polarity of the other adjacent magnet pole spaced by the shortest route.
The magnetic sensor includes a mangetoresistive effect element provided with narrow zonal portions including a pinned layer and a free layer.
Disposed below both ends of the free layer are bias magnet films composed of a permanent magnet that applies to the free layer a bias magnetic field in a predetermined direction and an initializing coil 31 that is disposed in the vicinity of the free layer and applies to the free layer a magnetic field having the direction same as that of the bias magnetic field by being energized under a predetermined condition. Further, magnetizing the bias magnet films and fixing the direction of magnetization of the pinned layer are performed by a magnetic field formed by a magnet array configured such that plural permanent magnets are arranged on a lattice point of a tetragonal lattice and a polarity of a magnet pole of each permanent magnet is different from a polarity of the other adjacent magnet pole spaced by the shortest route.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002-308376 | 2002-10-23 | ||
| JP2002308376 | 2002-10-23 | ||
| JP2003359790A JP3835447B2 (en) | 2002-10-23 | 2003-10-20 | Magnetic sensor, method for manufacturing the same, and magnet array suitable for the method |
| JP2003-359790 | 2003-10-20 | ||
| CA002445896A CA2445896C (en) | 2002-10-23 | 2003-10-21 | Magnetic sensor, production process of the magnetic sensor and magnetic array suitable for the production process |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002445896A Division CA2445896C (en) | 2002-10-23 | 2003-10-21 | Magnetic sensor, production process of the magnetic sensor and magnetic array suitable for the production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2576974A1 true CA2576974A1 (en) | 2004-04-23 |
| CA2576974C CA2576974C (en) | 2009-04-07 |
Family
ID=37912394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002576974A Expired - Fee Related CA2576974C (en) | 2002-10-23 | 2003-10-21 | Magnetic sensor, production process of the magnetic sensor and magnetic array suitable for the production process |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2576974C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114121400A (en) * | 2021-11-19 | 2022-03-01 | 中国科学院合肥物质科学研究院 | Simplified permanent magnet star simulator device |
-
2003
- 2003-10-21 CA CA002576974A patent/CA2576974C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114121400A (en) * | 2021-11-19 | 2022-03-01 | 中国科学院合肥物质科学研究院 | Simplified permanent magnet star simulator device |
| CN114121400B (en) * | 2021-11-19 | 2023-07-14 | 中国科学院合肥物质科学研究院 | Simplified permanent magnet star simulator device |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2576974C (en) | 2009-04-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |