Amorphous oxide magnetic material
AssigneeKabushiki Kaisha Toshiba
InventorsKoichiro Inomata, Susumu Hashimoto
Life of this patent
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Abstract
An amorphous oxide magnetic material is represented by a formula (1-y) [Ln.sub.1-x A.sub.x MnO.sub.3-.delta. ].multidot.y[XO] wherein x and y fall within the ranges of 0.1.ltoreq.x.ltoreq.1.0 and y.ltoreq.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 .delta. represents oxygen deficiency and .delta..ltoreq.1.
Claims18
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-.delta. ].multidot.y[XO]
- wherein XO is an oxide of said X and is calculated in terms of B.sub.2 O.sub.3, SiO.sub.2, MgO, MoO.sub.3, V.sub.2 O.sub.5, ZnO, P.sub.2 O.sub.5, or GeO.sub.2, and .delta. is oxygen deficiency equal to or less than 1, x and y fall within the ranges of 0.1.ltoreq.x.ltoreq.0.8 and y.ltoreq.0.7;
- respectively.
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-.delta. ].multidot.y[XO]
- wherein XO is an oxide of said X and is calculated in terms of B.sub.2 O.sub.3, SiO.sub.2, MgO, MoO.sub.3, V.sub.2 O.sub.5, ZnO, P.sub.2 O.sub.5, or GeO.sub.2, and .delta. is oxygen deficiency equal to or less than 1, x and y fall within the ranges of 0.1.ltoreq.x.ltoreq.0.8 and y.ltoreq.0.7;
- respectively.
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-.delta. ].multidot.y[XO]
- wherein XO is an oxide of said X and is calculated in terms of B.sub.2 O.sub.3, SiO.sub.2, MgO, MoO.sub.3, V.sub.2 O.sub.5, ZnO, P.sub.2 O.sub.5, or GeO.sub.2, and .delta. is oxygen deficiency equal to or less than 1, x and y fall within the range of 0.1.ltoreq.x.ltoreq.0.8 and y.ltoreq.0.7;
- respectively.
Dependencies are inferred from the claim text.