US6205008B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic-resistance device, and magnetic head employing such a device
Assignee: Sagem SA
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Filing: 1996-05-16
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Granted: 2001-03-20
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Expires: 2016-05-16
Abstract
Abstract A magneto-resistance device comprising two layers of ferromagnetic material mutually separated by at least one interposed layer of non-ferromagnetic material, in which at least one of the layers of ferromagnetic material comprises half-metallic material, and preferably both ferromagnetic layers are principally comprised of half-metallic material.
Inventors
- 👤 Martinus A. M. Gijs
- 👤 Paul J. Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:21
CPC Classifications
H; H10; H10N; H10N50/00; H10N50/10; G; G01; G01R; G01R33/00; G01R33/02; G01R33/06; G01R33/09; G01R33/093; B; B82; B82Y; B82Y10/00; B82Y25/00; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/39; G11B5/3903; H01; H01F; H01F10/00; H01F10/32; H01F10/3213; H01F10/324; H01F10/3254; H10N50/80; H10N50/85; G11B2005/3996
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
62 words
A magneto-resistive device comprising two layers of ferromagnetic material mutually separated essentially only by at least one layer of a non-ferromagnetic material, characterized in that said at least one layer of non-ferromagnetic material is electrically insulating and is in contact with one of said layers of ferromagnetic material and at least one of the layers of ferromagnetic material comprises a half-metallic material.
Claim 2
Dependent Claim
62 words
A magneto-resistive device comprising two layers of ferromagnetic material mutually separated essentially only by at least one layer of a non-ferromagnetic material, characterized in that said at least one layer of non-ferromagnetic material is electrically insulating and is in contact with one of said layers of ferromagnetic material and at least one of the layers of ferromagnetic material comprises a half-metallic material.
Claim 3
Dependent Claim
20 words
A magneto-resistance device according to claim 1 , characterised in that both ferromagnetic layers are principally comprised of half-metallic material.
Claim 4
Dependent Claim
18 words
A magneto-resistance device according to claim 2 , characterised in that the half-metallic material is a metal oxide.
Claim 5
Dependent Claim
13 words
A magnetic head comprising a magneto-resistance device as claimed in claim 2 .
Claim 6
Dependent Claim
18 words
A magneto-resistance device according to claim 1 , characterised in that the half-metallic material is a metal oxide.
Claim 7
Dependent Claim
32 words
A magneto-resistance device according to claim 3 , characterised in that the half-metallic material is selected from the group formed by Fe 3 O 4 , CrO 2 , and mixtures thereof.
Claim 8
Dependent Claim
13 words
A magnetic head comprising a magneto-resistance device as claimed in claim 6 .
Claim 9
Dependent Claim
13 words
A magnetic head comprising a magneto-resistance device as claimed in claim 5 .
Claim 10
Dependent Claim
13 words
A magnetic head comprising a magneto-resistive device as claimed in claim 1 .
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-03-19 | 2004-09-18 | 2005-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-03-19 | 2008-09-18 | 2009-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-03-19 | 2012-09-18 | 2013-03-20 | $7700.00 | Window Closed / Lapsed |