US3850706A
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Mn{11 {118 {11 M{11 {11 Ga Ge FERROMAGNETIC MATERIALS WHERE M COMPRISES TRANSITION METALS
Assignee: International Business Machines Corp
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Filing: 1972-09-15
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Granted: 1974-11-26
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Expires: 1992-09-15
Abstract
Abstract A room temperature stable ferromagnetic permanent magnet ternary intermetallic compound with a large Faraday rotation and having a Curie temperature less than 180*C having atomic proportions indicated by the formula:
Inventors
- 👤 G Street
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:10
CPC Classifications
C; C22; C22C; C22C28/00; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/0302; H01F1/0306; H01F1/032; H01F1/04; H01F1/047; H01F10/00; H01F10/08; H01F10/10; H01F10/12; Y; Y10; Y10S; Y10S428/00; Y10S428/90
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
42 words
A FERROMAGNETIC COMPOSITION CONSISTING ESSENTIALLY OF THE COMPOSITION IN ATOMIC PROPORTIONS OF MN1-XMXGAGE, WHERE 0<X LIMIT OF SOLID SOLUBILITY OF M WITHIN THE TETRAGONAL MNGAGE STRUCTURE, AND M IS CHOSEN FROM THE GROUP CONSISTING OF FE, NI, CO, CU, CR, V, TI.
Claim 2
Dependent Claim
42 words
A FERROMAGNETIC COMPOSITION CONSISTING ESSENTIALLY OF THE COMPOSITION IN ATOMIC PROPORTIONS OF MN1-XMXGAGE, WHERE 0<X LIMIT OF SOLID SOLUBILITY OF M WITHIN THE TETRAGONAL MNGAGE STRUCTURE, AND M IS CHOSEN FROM THE GROUP CONSISTING OF FE, NI, CO, CU, CR, V, TI.
Claim 3
Dependent Claim
16 words
The ferromagnetic composition of claim 1 wherein 0.01 < or = x < or = 0.10.
Claim 4
Dependent Claim
9 words
The ferromagnetic composition of claim 1 wherein X 0.05.
Claim 5
Dependent Claim
77 words
The ferromagnetic composition consisting essentially of the composition in atomic proportions of M1 xMxGa1 yKyGe1 zGz where M is chosen from the group consisting of Fe, Ni, Co, Cu, Cr, V, Ti, K is chosen from the group consisting of B, Al, In, Tl, and G is chosen from the group consisting of Si and Sn, and 0 < X+Y+Z < or = the limit of solid solubility in the MnGaGe tetragonal composition, and X+Z > 0.
Claim 6
Dependent Claim
77 words
The ferromagnetic composition consisting essentially of the composition in atomic proportions of M1 xMxGa1 yKyGe1 zGz where M is chosen from the group consisting of Fe, Ni, Co, Cu, Cr, V, Ti, K is chosen from the group consisting of B, Al, In, Tl, and G is chosen from the group consisting of Si and Sn, and 0 < X+Y+Z < or = the limit of solid solubility in the MnGaGe tetragonal composition, and X+Z > 0.
Claim 7
Dependent Claim
60 words
A data storage medium comprising a magnetic film upon a non-magnetic substrate, the magnetic film consisting essentially of the composition in atomic proportions of Mn1 xMxGaGe where 0 <x < or = the limit of solid solubility of M within the tetragonal MnGaGe structure, and M is chosen from the group consisting of Fe, Ni, Co, Cu, Cr, V, Ti.
Claim 8
Dependent Claim
60 words
A data storage medium comprising a magnetic film upon a non-magnetic substrate, the magnetic film consisting essentially of the composition in atomic proportions of Mn1 xMxGaGe where 0 <x < or = the limit of solid solubility of M within the tetragonal MnGaGe structure, and M is chosen from the group consisting of Fe, Ni, Co, Cu, Cr, V, Ti.
Claim 9
Dependent Claim
16 words
The magnetic film of claim 5 wherein 0.01 < or = x < or = 0.10.
Claim 10
Dependent Claim
9 words
The magnetic film of claim 5 wherein X 0.05.
Claim 11
Dependent Claim
14 words
The data storage medium of claim 5 wherein the substrate is a non-magnetic metal.
Claim 12
Dependent Claim
14 words
The data storage medium of claim 5 wherein the substrate is a glass material.
Claim 13
Dependent Claim
14 words
The data storage medium of claim 5 wherein the substrate is a ceramic material.
Claim 14
Dependent Claim
87 words
A data storage medium comprising a magnetic film upon a non-magnetic substrate, the magnetic film consisting essentially of the composition in atomic proportions of M1 xMxGa1 yKyGe1 zGz where M is chosen from the group consisting of Fe, Ni, Co, Cu, Cr, V, Ti, K is chosen from the group consisting of B, Al, In, Tl, and G is chosen from the group consisting of Si and Sn, and 0<X+Y+Z < or = the limit of solid solubility in the MnGaGe tetragonal composition, and X+Z > 0.
Claim 15
Dependent Claim
87 words
A data storage medium comprising a magnetic film upon a non-magnetic substrate, the magnetic film consisting essentially of the composition in atomic proportions of M1 xMxGa1 yKyGe1 zGz where M is chosen from the group consisting of Fe, Ni, Co, Cu, Cr, V, Ti, K is chosen from the group consisting of B, Al, In, Tl, and G is chosen from the group consisting of Si and Sn, and 0<X+Y+Z < or = the limit of solid solubility in the MnGaGe tetragonal composition, and X+Z > 0.
Claim 16
Dependent Claim
14 words
The data storage medium of claim 11 wherein the substrate is a non-magnetic metal.
Claim 17
Dependent Claim
14 words
The data storage medium of claim 11 wherein the substrate is a glass material.
Claim 18
Dependent Claim
14 words
The data storage medium of claim 11 wherein the substrate is a ceramic material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |