US5068050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amorphous oxide magnetic material
Assignee: Toshiba Corp
•
Filing: 1988-11-15
•
Granted: 1991-11-26
•
Expires: 2008-11-15
Abstract
Abstract An amorphous oxide magnetic material is represented by a formula (1-y) [Ln 1-x A x MnO 3- δ ]·y[XO] wherein x and y fall within the ranges of 0.1≦x≦1.0 and y≦0.7, respectively. Ln represents at least one element selected from the group consisting of Ln and a rare earth element. A represents at least one element selected from the group consisting of Ca, Sr, Ba and Pb, X represents at least one element selected from the group consisting of B, Bi, Si, Mg, Mo, V, Zn, P and Ge, and δ represents oxygen deficiency and δ≦1.
Inventors
- 👤 Koichiro Inomata
- 👤 Susumu Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:42
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/34; H01F1/38; G; G11; G11B; G11B5/00; G11B5/62; G11B5/64; G11B5/65; G11B5/658
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
150 words
An amorphous oxide ferromagnetic material consisting essentially of the following components: at least one element represented by Ln selected from the group consisting of Y and rare earth elements; at least one element represented by A selected from the group consisting of Ca, Sr, Ba, and Pb; Mn; at least one element represented by X selected from the group consisting of B, Bi, Si, Mg, Mo, V, Zn, P and Ge; and oxygen, the proportions of said components corresponding to the formula: (1-y)[Ln.sub.1-x A.sub.x MnO.sub.3-δ ]·y[XO] wherein XO is an oxide of said X and is calculated in terms of B 2 O 3 , SiO 2 , MgO, MoO 3 , V 2 O 5 , ZnO, P 2 O 5 , or GeO 2 , and δ is oxygen deficiency equal to or less than 1, x and y fall within the ranges of 0.1≦x≦0.8 and y≦0.7; respectively.
Claim 2
Dependent Claim
150 words
An amorphous oxide ferromagnetic material consisting essentially of the following components: at least one element represented by Ln selected from the group consisting of Y and rare earth elements; at least one element represented by A selected from the group consisting of Ca, Sr, Ba, and Pb; Mn; at least one element represented by X selected from the group consisting of B, Bi, Si, Mg, Mo, V, Zn, P and Ge; and oxygen, the proportions of said components corresponding to the formula: (1-y)[Ln.sub.1-x A.sub.x MnO.sub.3-δ ]·y[XO] wherein XO is an oxide of said X and is calculated in terms of B 2 O 3 , SiO 2 , MgO, MoO 3 , V 2 O 5 , ZnO, P 2 O 5 , or GeO 2 , and δ is oxygen deficiency equal to or less than 1, x and y fall within the ranges of 0.1≦x≦0.8 and y≦0.7; respectively.
Claim 3
Dependent Claim
8 words
A material according to claim 1, wherein 0.1≦x≦0.6.
Claim 4
Dependent Claim
8 words
A material according to claim 1, wherein 0.1≦y≦0.5.
Claim 5
Dependent Claim
8 words
A material according to claim 1, wherein 0.2≦y≦0.5.
Claim 6
Dependent Claim
11 words
A material according to claim 1, wherein said Ln contains La.
Claim 7
Dependent Claim
21 words
A material according to claim 5, wherein said Ln contains not less than 50 at % of La, based on Ln.
Claim 8
Dependent Claim
21 words
A material according to claim 6, wherein said Ln contains not less than 70 at % of La, based on Ln.
Claim 9
Dependent Claim
15 words
A material according to claim 1, wherein said XO contains B 2 O 3 .
Claim 10
Dependent Claim
24 words
A material according to claim 8, wherein said XO contains not less than 30 mol % of B 2 O 3 based on XO.
Claim 11
Dependent Claim
24 words
A material according to claim 9, wherein said XO contains not less than 50 mol % of B 2 O 3 based on XO.
Claim 12
Dependent Claim
24 words
A material according to claim 1, wherein said XO contains not less than 5 mol % of Bi 2 O 3 based on XO.
Claim 13
Dependent Claim
11 words
A material according to claim 1, wherein said A contains Sr.
Claim 14
Dependent Claim
21 words
A material according to claim 12, wherein said A contains not less than 50 at % of Sr, based on A.
Claim 15
Dependent Claim
21 words
A material according to claim 13, wherein said A contains not less than 70 at % of Sr, based on A.
Claim 16
Dependent Claim
25 words
A material according to claim 1, wherein not more than 50 at % of Mn in said amorphous oxide ferromagnetic material are substituted by Co.
Claim 17
Dependent Claim
154 words
A magnetic core including an amorphous oxide ferromagnetic material consisting essentially of the following components: at least one element represented by Ln selected from the group consisting of Y and rare earth elements; at least one element represented by A selected from the group consisting of Ca, Sr, Ba, and Pb; Mn; at least one element represented by X selected from the group consisting of B, Bi, Si, Mg, Mo, V, Zn, P and Ge; and oxygen, the proportions of said components corresponding to the formula: (1-y)[Ln.sub.1-x A.sub.x MnO.sub.3-δ ]·y[XO] wherein XO is an oxide of said X and is calculated in terms of B 2 O 3 , SiO 2 , MgO, MoO 3 , V 2 O 5 , ZnO, P 2 O 5 , or GeO 2 , and δ is oxygen deficiency equal to or less than 1, x and y fall within the ranges of 0.1≦x≦0.8 and y≦0.7; respectively.
Claim 18
Dependent Claim
154 words
A magnetic core including an amorphous oxide ferromagnetic material consisting essentially of the following components: at least one element represented by Ln selected from the group consisting of Y and rare earth elements; at least one element represented by A selected from the group consisting of Ca, Sr, Ba, and Pb; Mn; at least one element represented by X selected from the group consisting of B, Bi, Si, Mg, Mo, V, Zn, P and Ge; and oxygen, the proportions of said components corresponding to the formula: (1-y)[Ln.sub.1-x A.sub.x MnO.sub.3-δ ]·y[XO] wherein XO is an oxide of said X and is calculated in terms of B 2 O 3 , SiO 2 , MgO, MoO 3 , V 2 O 5 , ZnO, P 2 O 5 , or GeO 2 , and δ is oxygen deficiency equal to or less than 1, x and y fall within the ranges of 0.1≦x≦0.8 and y≦0.7; respectively.
Claim 19
Dependent Claim
155 words
An information recording medium including an amorphous oxide ferromagnetic material consisting essentially of the following components: at least one element represented by Ln selected from the group consisting of Y and rare earth elements; at least one element represented by A selected from the group consisting of Ca, Sr, Ba, and Pb; Mn; at least one element represented by X selected from the group consisting of B, Bi, Si, Mg, Mo, V, Zn, P and Ge; and oxygen, the proportions of said components corresponding to the formula: (1-y)[Ln.sub.1-x A.sub.x MnO.sub.3-δ ]·y[XO] wherein XO is an oxide of said X and is calculated in terms of B 2 O 3 , SiO 2 , MgO, MoO 3 , V 2 O 5 , ZnO, P 2 O 5 , or GeO 2 , and δ is oxygen deficiency equal to or less than 1, x and y fall within the range of 0.1≦x≦0.8 and y≦0.7; respectively.
Claim 20
Dependent Claim
155 words
An information recording medium including an amorphous oxide ferromagnetic material consisting essentially of the following components: at least one element represented by Ln selected from the group consisting of Y and rare earth elements; at least one element represented by A selected from the group consisting of Ca, Sr, Ba, and Pb; Mn; at least one element represented by X selected from the group consisting of B, Bi, Si, Mg, Mo, V, Zn, P and Ge; and oxygen, the proportions of said components corresponding to the formula: (1-y)[Ln.sub.1-x A.sub.x MnO.sub.3-δ ]·y[XO] wherein XO is an oxide of said X and is calculated in terms of B 2 O 3 , SiO 2 , MgO, MoO 3 , V 2 O 5 , ZnO, P 2 O 5 , or GeO 2 , and δ is oxygen deficiency equal to or less than 1, x and y fall within the range of 0.1≦x≦0.8 and y≦0.7; respectively.
Claim 21
Dependent Claim
25 words
A medium according to claim 17, wherein not more than 50 at % of Mn in said amorphous oxide magnetic material are substituted by Co.
References Cited (Backward Citations)
US2677663A
Cited
US2703354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-25 | 1995-05-27 | 1995-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-25 | 1999-05-27 | 1999-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-25 | 2003-05-27 | 2003-11-26 | $7700.00 | Window Closed / Lapsed |