EP0167118A2
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EP
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Oxygen-containing ferromagnetic amorphous alloy and method of preparing the same
Assignee: Casio Computer Co Ltd
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Filing: 1985-06-27
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Granted: —
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Expires: 2005-06-27
Abstract
Abstract An oxygen-containing ferromagnetic amorphous alloy with a novel structure which is represented by the general formula: (wherein M is one or more transition elements of Fe, Co and Ni; or a combination of the transition element or elements and one or more elements selected from the group consisting of V. Cr. Mn, Nb, Mo, Hf. Ta, W, Pt, Sm. Gd. Tb, Dy and Ho: G is one or more elements selected from the group consisting of B. Si. Ge, As, Sb, Ti, Sn, Al and Zr; and x, y and z are the fractional atomic percentages of M, G and 0 (Oxygen) of the alloy totaling 100, i.e., x+y+z=100), the composition of the amorphous alloy being in the pentagonal region ABCDE of the triangular diagram in Figure 1. In a preferred embodiment, the ferromagnetic amorphous alloy can be prepared in a film form by a sputtering process and the thus prepared amorphous alloy possess a superior combination of properties, particularly with regard to highly valuable magnetic properties (high saturation magnetization, high squareness ratio, etc.), high electrical resistivity.
Inventors
- 👤 Toshio Kudo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 06:58
CPC Classifications
C; C22; C22C; C22C45/00; C22C45/008; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/34; H01F1/38; H01F10/00; H01F10/08; H01F10/10; H01F10/12; H01F10/13; H01F41/00; H01F41/14; H01F41/18
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
179 words
An oxygen-containing ferromagnetic amorphous alloy which is represented by the general formula: (wherein M is one or more transition elements of Fe, Co and Ni; or a combination of said transition element or elements and one or more elements selected from the group consisting of V, Cr, Mn, Nb, Mo, Hf, Ta, W, Pt, Sm, Gd, Tb, Dy and Ho; G is one or more elements selected from the group consisting of B, Si, Ge, As, Sb, Ti, Sn, Al and Zr; and x, y and z are the fractional atomic percentages of M, G and 0 (Oxygen) of said alloy totaling 100, i.e., x+y+z=100), the composition of said amorphous alloy being represented as (x, y, z) in the triangular diagram shown in the accompanying Fig. 1 and being in the pentagonal region defined by the respective lines joining the points of A (80, 19, 1), B (50, 49, 1), C (36, 36, 28), D (36, 4, 60) and E (38.5, 1.5, 60) shown in said Fig. 1, and said oxygen (0) being introduced from the oxide source material.
Claim 2
Dependent Claim
179 words
An oxygen-containing ferromagnetic amorphous alloy which is represented by the general formula: (wherein M is one or more transition elements of Fe, Co and Ni; or a combination of said transition element or elements and one or more elements selected from the group consisting of V, Cr, Mn, Nb, Mo, Hf, Ta, W, Pt, Sm, Gd, Tb, Dy and Ho; G is one or more elements selected from the group consisting of B, Si, Ge, As, Sb, Ti, Sn, Al and Zr; and x, y and z are the fractional atomic percentages of M, G and 0 (Oxygen) of said alloy totaling 100, i.e., x+y+z=100), the composition of said amorphous alloy being represented as (x, y, z) in the triangular diagram shown in the accompanying Fig. 1 and being in the pentagonal region defined by the respective lines joining the points of A (80, 19, 1), B (50, 49, 1), C (36, 36, 28), D (36, 4, 60) and E (38.5, 1.5, 60) shown in said Fig. 1, and said oxygen (0) being introduced from the oxide source material.
Claim 3
Dependent Claim
48 words
An oxygen-containing ferromagnetic amorphous alloy as claimed in Claim 1 in which said alloy is prepared as a ferromagnetic amorphous film which is formed by sputtering process using a composite target or targets composed of a glass-forming oxide compound and a metal or said compound and an alloy.
Claim 4
Dependent Claim
44 words
An oxygen-containing ferromagnetic amorphous alloy as claimed in Claim 1 in which said alloy is prepared as a ferromagnetic amorphous film which is formed by sputtering process using a composite target or targets composed of a glass-forming oxide compound and an amorphous phase-forming alloy.
Claim 5
Dependent Claim
43 words
An oxygen-containing ferromagnetic amorphous alloy as claimed in Claim 1 in which said alloy is prepared as a ferromagnetic amorphous film which is formed by sputtering process using a composite target or targets composed of an oxide compound and an amorphous phase-forming alloy.
Claim 6
Dependent Claim
54 words
An oxygen-containing ferromagnetic amorphous alloy as claimed in Claim 1 in which said alloy is prepared as a ferromagnetic amorphous film which is formed by sputtering process using a composite target or targets composed of a powdered oxide mixture containing a glass-forming oxide compound and a metal or said powdered oxide mixture and alloy.
Claim 7
Dependent Claim
55 words
An oxygen-containing ferromagnetic amorphous alloy as claimed in Claim 2 in which said glass-forming oxide compound is selected from the group consisting of B 2 0 3 , Si0 2 , GeO 2 , As 2 0 3 , Sb 2 0 3 , Ti0 2 , Sn0 2 , Al203 and ZrO 2 .
Claim 8
Dependent Claim
59 words
An oxygen-containing ferromagnetic amorphous alloy as claimed in Claim 3 in which said glass-forming oxide compound is selected from the group consisting of B 2 0 3 , Si0 2 , Ge0 2 , As 2 0 3 , Sb 2 0 3 , Ti0 2 , Sn0 2 , A1 2 0 3 and Zr 0 2 .
Claim 9
Dependent Claim
59 words
An oxygen-containing ferromagnetic amorphous alloy as claimed in Claim 5 in which said glass-forming oxide compound is selected from the group consisting of B 2 0 3 , S i 0 2 , G e0 2 , AS 2 0 3 , Sb 2 O 3 , TiO 2 r SnO 2 , A1203 and Zr 0 2 .
Claim 10
Dependent Claim
61 words
An oxygen-containing ferromagnetic amorphous alloy as claimed in Claim 2 in which said metal or alloy is selected from the transition elements of Fe, Co and Ni or alloys of said transition element or elements and one or more elements selected from the group consisting of V, Cr, Mn, Nb, Mo, Hf, Ta, W, Pt, Sm, Gd, Tb, Dy and Ho.
Claim 11
Dependent Claim
60 words
An oxygen-containing ferromagnetic amorphous alloy as claimed in Claim 5 in which said metal or alloy is selected from the transition elements of Fe, Co and Ni, or alloys of said transition element or elements and one or more elements selected from group consisting of V, Cr, Mn, Nb, Mo, Hf, Ta, W, Pt, Sm, Gd, Tb, Dy and Ho.
Claim 12
Dependent Claim
71 words
An oxygen-containing ferromagnetic amorphous alloy as claimed in Claim 3 in which said amorphous phase-forming alloy is selected from the alloys of one or more elements selected from the group consisting of V, Cr, Mn, Fe, Co, Ni, Nb, Mo, Hf, Ta, W, Pt, Sm, Gd, Tb, Dy and Ho and one or more elements selected from the group consisting of B, Si, Ge, As, Sb, Ti, Sn, Al and Zr.
Claim 13
Dependent Claim
71 words
An oxygen-containing ferromagnetic amorphous alloy as claimed in Claim 4 in which said -amorphous phase-forming alloy is selected from the alloys of one or more elements selected from the group consisting of V, Cr, Mn, Fe, Co, Ni, Nb, Mo, Hf, Ta, W, Pt, Sm, Gd, Tb, Dy and Ho and one or more elements selected from the group consisting of B, Si, Ge, As, Sb, Ti, Sn, Al and Zr.
Claim 14
Dependent Claim
43 words
An oxygen-containing ferromagnetic amorphous alloy as claimed in Claim 4 in which said oxide compound is selected from the group consisting of oxide compounds of V, Cr, Mn, Fe, Co, Ni, Nb, Mo, Hf, Ta, W, Pt, Sm, Gd, Tb, Dy and Ho.
Claim 15
Dependent Claim
47 words
An oxygen-containing ferromagnetic amorphous alloy as claimed in Claim 5 in which said powdered oxide mixture contains an oxide compound selected from the group consisting of oxide compounds of V, Cr, Mn, Fe, Co, Ni, Nb, Mo, Hf, Ta, W, Pt, Sm, Gd, Tb, Dy and Ho.
Claim 16
Independent Claim
197 words
A method of preparing an oxygen-containing ferromagnetic amorphous alloy, said method comprising the step of: forming a film of an amorphous alloy, said amorphous alloy being represented by the general formula: (whereinM is one or more transition elements of Fe, Co and Ni or a combination of said transition element or elements and one or more elements selected from the group consisting of V, Cr, Mn, Nb, Mo, Hf, Ta, W, Pt, Sm, Gd, Tb, Dy and Ho; G is one or more elements selected from the group consisting of B, Si, Ge, As, Sb, Ti, Sn, Al and Zr; and x, y and z are the fractional atomic percentages of M, G and 0 (Oxygen) of the alloy totaling 100, i.e., x+y+z=100), the composition of said amorphous alloy being represented as (x, y, z) in the triangular diagram shown in the accompanying Fig. 1 and being in the pentagonal region defined by the respective lines joining the points of A (80, 19, 1), B (50, 49, 1), C (36, 36, 28), D (36, 4, 60) and E (38.5, 1.5, 60) shown in said Fig. 1, and said oxygen (O) being introduced from the oxide source material.
Claim 17
Independent Claim
197 words
A method of preparing an oxygen-containing ferromagnetic amorphous alloy, said method comprising the step of: forming a film of an amorphous alloy, said amorphous alloy being represented by the general formula: (whereinM is one or more transition elements of Fe, Co and Ni or a combination of said transition element or elements and one or more elements selected from the group consisting of V, Cr, Mn, Nb, Mo, Hf, Ta, W, Pt, Sm, Gd, Tb, Dy and Ho; G is one or more elements selected from the group consisting of B, Si, Ge, As, Sb, Ti, Sn, Al and Zr; and x, y and z are the fractional atomic percentages of M, G and 0 (Oxygen) of the alloy totaling 100, i.e., x+y+z=100), the composition of said amorphous alloy being represented as (x, y, z) in the triangular diagram shown in the accompanying Fig. 1 and being in the pentagonal region defined by the respective lines joining the points of A (80, 19, 1), B (50, 49, 1), C (36, 36, 28), D (36, 4, 60) and E (38.5, 1.5, 60) shown in said Fig. 1, and said oxygen (O) being introduced from the oxide source material.
Claim 18
Dependent Claim
15 words
A method as claimed in Claim 15 in which said film is formed by sputtering.
Claim 19
Dependent Claim
25 words
A method as claimed in Claim 15 in which said film is further heat-treated at a temperature below the crystallization temperature of said amorphous alloy.
References Cited (Backward Citations)
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