US4663607A
Expired / Lapsed
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Magnetoresistive element
Assignee: HGST Japan Ltd
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Filing: 1985-05-28
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Granted: 1987-05-05
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Expires: 2005-05-28
Abstract
Abstract A magnetroresistive element formed by laminating a plurality of metallic magnetoresistance effect films having magnetostriction of different signs on a substrate. The magnetoresistive element can be formed to exhibit zero magnetostriction or to exhibit magnetostriction of any desired value. Further, the magnetoresistive element exhibits magnetostriction that changes little with the change in the film composition. The metallic magnetoresistance effect films preferably have positive and negative magnetostriction with an absolute value not greater than 15×10 -6 .
Inventors
- 👤 Masahiro Kitada
- 👤 Hideo Tanabe
- 👤 Noboru Shimizu
- 👤 Hiroshi Tsuchiya
- 👤 Masao Katsumata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:16
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/39; G11B5/3903; H; H10; H10N; H10N35/00; H10N35/101; H10N50/00; H10N50/10; G11B5/3906; G11B5/3945; G11B5/3948
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
49 words
A magnetoresistive element comprising a predetermined nonmagnetic and insulating substrate, and a multilayer film which is formed by alternately laminating a metallic magnetoresistance effect film having a predetermined thickness and a predetermined positive magnetostriction and a metallic magnetoresistance effect film having a predetermined thickness and a predetermined negative magnetostriction.
Claim 2
Dependent Claim
49 words
A magnetoresistive element comprising a predetermined nonmagnetic and insulating substrate, and a multilayer film which is formed by alternately laminating a metallic magnetoresistance effect film having a predetermined thickness and a predetermined positive magnetostriction and a metallic magnetoresistance effect film having a predetermined thickness and a predetermined negative magnetostriction.
Claim 3
Dependent Claim
30 words
A magnetoresistive element according to claim 1, wherein each of said metallic magnetoresistance effect films have positive and negative magnetostriction with an absolute value not greater than 15×10 -6 .
Claim 4
Dependent Claim
38 words
A magnetoresistive element according to claim 1, wherein each of said metallic magnetoresistance effect films having positive and negative magnetostriction is 10 angstroms or more in thickness, and said multilayer film is 1000 angstroms or less in thickness.
Claim 5
Dependent Claim
38 words
A magnetoresistive element according to claim 2, wherein each of said metallic magnetoresistance effect films having positive and negative magnetostrictions is 10 angstroms or more in thickness, and said multilayer film is 1000 angstroms or less in thickness.
Claim 6
Dependent Claim
16 words
A magnetoresistive element according to claim 1, wherein magnetostriction of the multilayer film is substantially zero.
Claim 7
Dependent Claim
42 words
A magnetoresistive element according to claim 5, wherein said multilayer film is formed by alternately laminating an equal number of metallic magnetoresistance effect films that have an equal thickness and an equal absolute value of magnetostriction but whose magnetostriction has opposite signs.
Claim 8
Dependent Claim
51 words
A magnetoresistive element according to claim 6, wherein said metallic magnetoresistance effect films have positive and negative magnetostriction of not greater than 15×10 -6 in absolute value, each of said magnetoresistance effect films is greater than 10 angstroms in thickness, and said multilayer film is 1000 angstroms or less in thickness.
Claim 9
Dependent Claim
63 words
A magnetoresistive element according to claim 5, wherein said multilayer film is a three layer film formed by laminating a first metallic magnetoresistance effect film having a predetermined thickness and a predetermined magnetostriction between two other metallic magnetoresistance films each having a predetermined thickness and each having a predetermined magnetostriction of opposite sign than the magnetostriction of said first metallic magnetoresistance effect film.
Claim 10
Dependent Claim
51 words
A magnetoresistive element according to claim 8, wherein said metallic magnetoresistance effect films have positive and negative magnetostriction of not greater than 15×10 -6 in absolute value, each of said magnetoresistance effect films is greater than 10 angstroms in thickness, and said multilayer film is 1000 angstroms or less in thickness.
Claim 11
Dependent Claim
17 words
A magnetoresistive element according to claim 9, wherein said metallic magnetoresistance effect films are of equal thickness.
Claim 12
Dependent Claim
25 words
A magnetoresistive element according to claim 8, wherein said first metallic magnetoresistance effect film is a film of a Ni-Fe alloy having about 10% Fe.
Claim 13
Dependent Claim
28 words
A magnetoresistive element according to claim 11, wherein each of said two other metallic magnetoresistance effect films is a film of a Ni-Fe alloy having about 24% Fe.
Claim 14
Dependent Claim
15 words
A magnetoresistive element according to claim 1, wherein magnetostriction of the multilayer film is positive.
Claim 15
Dependent Claim
15 words
A magnetoresistive element according to claim 1, wherein magnetostriction of the mutlilayer film is negative.
Claim 16
Dependent Claim
35 words
A magnetoresistive element according to claim 1, wherein said metallic magnetoresistance effect films are films of a material selected from the group consisting of Ni-Fe alloys, Ni-Co alloys, Co-Nb alloys, Co-Zr alloys and Co-W alloys.
Claim 17
Dependent Claim
48 words
A magnetoresistive element according to claim 6, wherein said metallic magnetoresistance effect film having a positive magnetostriction is a film of Co-Ni alloy having about 55% Ni and said metallic magnetoresistance effect film having a negative magnetostriction is a film of a Ni-Fe alloy having about 10% Fe.
Claim 18
Dependent Claim
35 words
A magnetoresistive element according to claim 6, wherein said multilayer film is formed by alternately laminating two metallic magnetoresistance effect films having a positive magnetostriction with two metallic magnetoresistance effect films having a negative magnetostriction.
Claim 19
Dependent Claim
22 words
A magnetoresistive element according to claim 1, wherein said metallic magnetoresistance effect films of said multilayer film are stacked on each other.
References Cited (Backward Citations)
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