Claims
- 1. A soft-film-bias type magnetoresistive device, comprising:
- a thin magnetoresistive film extending in a direction perpendicular to a magnetic recording medium and having a magnetic easy axis perpendicular to a direction of movement of said magnetic recording medium;
- electrodes formed on said thin magnetoresistive film at both end parts and a central part thereof in the direction of the magnetic easy axis of said thin magnetoresistive film to provide current to said thin magnetoresistive film such that said current flows from both of said end parts toward said central part of said thin magnetoresistsive film so as to produce at least one magnetic field around said thin magnetoresistive film; and
- a high-permeability magnetic body magnetically coupled with and electrically isolated from said thin magnetoresistive film and disposed parallel to and spaced from said thin magnetoresistive film in the direction of the movement of said magnetic recording medium such that said at least one magnetic field produced by said current flowing in said thin magnetoresistive film is shifted to produce at least one bias magnetic field across said thin film magnetoresistive film wherein said high-permeability magnetic body is a non-permanent magnetic member enabling shifting of said at least one magnetic field produced by said current flowing in said thin magnetoresistive film without the use of any additional current to generate a magnetic field by said non-permanent magnetic member.
- 2. A soft-film-bias type magnetoresistive device according to claim 1, wherein said high-permeability magnetic body is a thin high-permeability magnetic film.
- 3. A soft-film-bias type magnetoresistive device according to claim 1, wherein said high-permeability magnetic body is cut into two separate parts at a position corresponding to the electrode which is disposed at the central part of said thin magnetoresistive film.
- 4. A soft-film-bias type magneto-resistive device according to claim 2, wherein said high-permeability magnetic body is cut into two separate parts at a position corresponding to the electrode which is disposed at the central part of said thin magnetoresistive film.
- 5. A soft-film-bias type magneto-resistive device according to claim 1, wherein said high-permeability magnetic body is constricted at a position corresponding to the electrode which is disposed at the central part of said thin magnetoresistive film.
- 6. A soft-film-bias type magneto-resistive device according to claim 2, wherein said high-permeability magnetic body is constricted at a position corresponding to the electrode which is disposed at the central part of said thin magnetoresistive film.
- 7. A soft-film-bias type magnetoresistive device according to claim 1, wherein said high-permeability magnetic body is a massive body.
- 8. A soft-film-bias type magnetoresistive device according to claim 1, wherein at least one magnetic shielding body is provided on both sides of said soft-film-bias type magnetoresistive device.
- 9. A soft-film-bias type magneto-resistive device according to claim 8, wherein said high-permeability magnetic body also acts as a magnetic shielding body.
- 10. A soft-film-bias type magnetoresistive device according to claim 8, wherein at least one of said magnetic shielding bodies is a thin magnetic shielding film.
- 11. A soft-film-bias type magnetoresistive device according to claim 8, wherein at least one of said magnetic shielding bodies is a massive magnetic shielding body.
Priority Claims (1)
Number |
Date |
Country |
Kind |
60-38726 |
Mar 1985 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 828,350, filed Feb. 11, 1986, now abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (5)
Number |
Date |
Country |
0127918 |
Aug 1982 |
JPX |
0108026 |
Jun 1983 |
JPX |
0220241 |
Dec 1983 |
JPX |
0152521 |
Aug 1984 |
JPX |
0165228 |
Sep 1984 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
828350 |
Feb 1986 |
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