US5716719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetoresistance effect element
Assignee: Toshiba Corp
•
Filing: 1994-02-02
•
Granted: 1998-02-10
•
Expires: 2014-02-02
Abstract
Abstract A multilayer comprising magnetic layers and nonmagnetic layers, which are stacked in a manner to produce a magnetoresistance effect, is formed on a main surface of a substrate having at least the surface portion formed of a single crystal of cubic system. The (110) plane of said single crystal constituting the main surface of the substrate. The magnetic layers are distorted such that a uniaxial easy axis of magnetization is formed within a plane.
Inventors
- 👤 Yoshiaki Saito
- 👤 Koichiro Inomata
- 👤 Susumu Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:15
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/06; G01R33/09; G01R33/093; B; B82; B82Y; B82Y25/00; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/39; G11B5/3903; H; H01; H01F; H01F10/00; H01F10/32; H01F10/3218; H10; H10N; H10N50/00; H10N50/80; H10N50/85; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/928; Y10T; Y10T428/00; Y10T428/12; Y10T428/12465; Y10T428/12493; Y10T428/12535; Y10T428/12583; Y10T428/12611; Y10T428/12771; Y10T428/12861; Y10T428/12889; Y10T428/12896; Y10T428/12903; Y10T428/1291; Y10T428/12917; Y10T428/12944; Y10T428/12951
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
150 words
A magnetoresistance effect element, comprising: a substrate at least a surface portion of which is formed of a single crystal of cubic crystal system, the (110) plane of said single crystal constituting a main surface of said substrate; and an artificial lattice film multilayer formed on the main surface of the substrate, said multilayer including magnetic layers and non-magnetic metal layers, said magnetic and non-magnetic layers being stacked in a manner to produce a magnetoresistance effect, and said magnetic layers being distorted such that a uniaxial easy axis of magnetization is formed within a plane, wherein said non-magnetic layers are formed of at least one metal selected from the group consisting of Cu, Au, Ag, and an alloy containing Cu, Au, or Ag, and wherein said magnetic layers are formed of a material selected from the group consisting of Fe, Co, Ni, and an alloy containing Fe, Co or Ni.
Claim 2
Dependent Claim
150 words
A magnetoresistance effect element, comprising: a substrate at least a surface portion of which is formed of a single crystal of cubic crystal system, the (110) plane of said single crystal constituting a main surface of said substrate; and an artificial lattice film multilayer formed on the main surface of the substrate, said multilayer including magnetic layers and non-magnetic metal layers, said magnetic and non-magnetic layers being stacked in a manner to produce a magnetoresistance effect, and said magnetic layers being distorted such that a uniaxial easy axis of magnetization is formed within a plane, wherein said non-magnetic layers are formed of at least one metal selected from the group consisting of Cu, Au, Ag, and an alloy containing Cu, Au, or Ag, and wherein said magnetic layers are formed of a material selected from the group consisting of Fe, Co, Ni, and an alloy containing Fe, Co or Ni.
Claim 3
Dependent Claim
20 words
The magnetoresistance effect element according to claim 1, wherein a buffer layer is interposed between the substrate and the multilayer.
Claim 4
Dependent Claim
36 words
The magnetoresistance effect element according to claim 1, wherein the substrate is formed of a material selected from the group consisting of Cr, MgO, GaAs, Si, Cu, Fe, Co, Ni, CaF 2 and LiF 2 .
Claim 5
Dependent Claim
24 words
The magnetoresistance effect element according to claim 1, wherein one of said magnetic layers of said multilayer is in direct contact with the substrate.
Claim 6
Dependent Claim
27 words
The magnetoresistance effect element according to claim 1, wherein the magnetic metal layer contains an alloy Co 1-x Fe x , where x is smaller than 0.5.
Claim 7
Dependent Claim
27 words
The magnetoresistance effect element according to claim 5, wherein the magnetic metal layer contains an alloy Co 1-x Fe x , where x is smaller than 0.3.
Claim 8
Dependent Claim
31 words
The magnetoresistance effect element according to claim 1, wherein the magnetic metal layer is formed of an alloy Co 1-x-y Fe x Ni y , where (x+y) is smaller than 0.5.
Claim 9
Dependent Claim
31 words
The magnetoresistance effect element according to claim 7, wherein the magnetic metal layer is formed of an alloy Co 1-x-y Fe x Ni y , where (x+y) is smaller than 0.3.
Claim 10
Dependent Claim
25 words
The magnetoresistance effect element according to claim 1, wherein the magnetic layer has a thickness falling within a range of between 2 and 50 Å.
Claim 11
Dependent Claim
25 words
The magnetoresistance effect element according to claim 1, wherein the nonmagnetic layer has a thickness falling within a range of between 2 and 100 Å.
Claim 12
Dependent Claim
21 words
The magnetoresistance effect element as claimed in claim 1, wherein said magnetic and non-magnetic metal layers are each 10 Å thick.
Claim 13
Dependent Claim
25 words
The magnetoresistance effect element as claimed in claim 11, wherein said magnetic metal layers consist of Co and said non-magnetic metal layers consist of Cu.
Claim 14
Dependent Claim
25 words
The magnetoresistance effect element as claimed in claim 1, wherein said magnetic metal layers consist of Co and said non-magnetic metal layers consist of Cu.
Claim 15
Dependent Claim
20 words
The magnetoresistance effect element as claimed in claim 1, wherein said artificial lattice film multilayer is formed by epitaxial growth.
References Cited (Backward Citations)
US3350180A
Cited
EP0063397A1
Cited
JPS6150203A
Cited
JPS6363117A
Cited
US4949039A
Cited
US5134533A
Cited
EP0406060A1
Cited
EP0406061A1
Cited
JPH03150881A
Cited
EP0442407A1
Cited
JPH03286413A
Cited
EP0498344A1
Cited
WO1992015102A1
Cited
EP0504473A1
Cited
US5366815A
Cited
US5523172A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-02-09 | 2001-08-11 | 2002-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-02-09 | 2005-08-11 | 2006-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-02-09 | 2009-08-11 | 2010-02-10 | $7700.00 | Window Closed / Lapsed |