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EP0286124A2
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Nitrogen-containing magnetic alloy film
Assignee: Panasonic Holdings Corp
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Filing: 1988-04-08
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Granted: —
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Expires: 2008-04-08
Abstract
Abstract A nitrogen-containing magnetic alloy film composed of T-M-X amorphous alloy film and (T-M-X)N nitride film, and another film having a composition represented by (T-M-X)N and being compositionally modulated (In both cases T is at least one element selected from the group of Fe, Co, Ni and Mn, M is at least one element selected from the group of Ti, Zr, Hf, Nb, Ta, Cr, Mo, W, Re and Ru, X is at least one element selected from the group of B, Si, Ge and Al, and N is nitrogen.) show excellent characteristics for magnetic head cores such as soft magnetic property and wear resistance.
Inventors
- 👤 Hiroshi Sakakima
- 👤 Koichi Osano
- 👤 Yuji Omata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 01:36
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/12; H01F10/13; B; B82; B82Y; B82Y25/00; H01F10/132; H01F10/32; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/11; Y10T428/1157; Y10T428/12; Y10T428/12465; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12931
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
166 words
A nitrogen-containing magnetic alloy film comprising: an amorphous alloy film represented by the following formula: T a M b X c and a nitride alloy film represented by the following formula: wherein T is at least one element selected from the group consisting of Fe, Co, Ni and Mn, M is at least one element selected from the group consisting of Ti, Zr, Hf, Nb, Ta, Cr, Mo, W, Re and Ru, X is at least one element selected from the group consisting of B, Si, Ge and Al, N is nitrogen, and suffixes a, b, c and d show atomic percentages of the elements T, M, X and N, respectively, and the values of a, b, c and d are defined by the following expressions: 70 ≦ a ≦ 90 , 0 ≦ b ≦ 20 , c ≦ 30 , b + c ≧ 10 , 1 ≦ d < 30 , and said amorphous alloy film and said nitride alloy film being laminated.
Claim 2
Dependent Claim
166 words
A nitrogen-containing magnetic alloy film comprising: an amorphous alloy film represented by the following formula: T a M b X c and a nitride alloy film represented by the following formula: wherein T is at least one element selected from the group consisting of Fe, Co, Ni and Mn, M is at least one element selected from the group consisting of Ti, Zr, Hf, Nb, Ta, Cr, Mo, W, Re and Ru, X is at least one element selected from the group consisting of B, Si, Ge and Al, N is nitrogen, and suffixes a, b, c and d show atomic percentages of the elements T, M, X and N, respectively, and the values of a, b, c and d are defined by the following expressions: 70 ≦ a ≦ 90 , 0 ≦ b ≦ 20 , c ≦ 30 , b + c ≧ 10 , 1 ≦ d < 30 , and said amorphous alloy film and said nitride alloy film being laminated.
Claim 3
Dependent Claim
26 words
A nitrogen-containing magnetic alloy film in accordance with claim 1, wherein thickness of said amorphous alloy film and said nitride alloy film is below 1000 A°.
Claim 4
Dependent Claim
153 words
A nitrogen-containing magnetic alloy film represented by the following formula: wherein T is at least one element selected from the group consisting of Fe, Co, Ni and Mn, M is at least one element selected from the group consisting of Ti, Zr, Hf, Nb, Ta, Cr, Mo, W, Re and Ru, X is at least one element selected from the group consisting of B, Si, Ge and Al, N is nitrogen, and suffixes aʹ, bʹ, cʹ and dʹ show atomic percentages of the elements T, M, X and N respectively, and said values of aʹ, bʹ, cʹ and dʹ are defined by the following expressions: 70 ≦ aʹ ≦ 90 , 0 ≦ bʹ ≦ 20 , cʹ ≦ 30 , bʹ + cʹ ≧ 10 , 1 ≦ dʹ ≦ 20 , and at least nitrogen (N) in said nitrogen-containing magnetic alloy film being compositionally modulated in a direction of film thickness.
Claim 5
Dependent Claim
153 words
A nitrogen-containing magnetic alloy film represented by the following formula: wherein T is at least one element selected from the group consisting of Fe, Co, Ni and Mn, M is at least one element selected from the group consisting of Ti, Zr, Hf, Nb, Ta, Cr, Mo, W, Re and Ru, X is at least one element selected from the group consisting of B, Si, Ge and Al, N is nitrogen, and suffixes aʹ, bʹ, cʹ and dʹ show atomic percentages of the elements T, M, X and N respectively, and said values of aʹ, bʹ, cʹ and dʹ are defined by the following expressions: 70 ≦ aʹ ≦ 90 , 0 ≦ bʹ ≦ 20 , cʹ ≦ 30 , bʹ + cʹ ≧ 10 , 1 ≦ dʹ ≦ 20 , and at least nitrogen (N) in said nitrogen-containing magnetic alloy film being compositionally modulated in a direction of film thickness.
Claim 6
Dependent Claim
19 words
A nitrogen-containing magnetic alloy film in accordance with claim 3, wherein compositional modulation wavelength λ is below 2000 Å.
References Cited (Backward Citations)
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