Magnetoresistive film
AssigneeSanyo Electric Co., Ltd.
InventorsMasayuki Fujita, Atsushi Maeda, Satoru Oikawa, Koji Yamano, Minoru Kume
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Abstract
A magnetoresistive film is disclosed which has a layered structure comprising a first ferromagnetic layer, a second ferromagnetic layer, a nonmagnetic conductive layer interposed between the first and second ferromagnetic layers, and an antiferromagnetic layer coupled with one of the first and second ferromagnetic layers. The antiferromagnetic layer comprises an antiferromagnetic material selected from an antimony-base alloy, fluoride, an FeRh-base alloy, FeS, an IrMnCo-base alloy and a CrAl-base alloy.
Claims45
A magnetoresistive film having a layered structure, said layered structure comprising:
- a first ferromagnetic layer;
- a second ferromagnetic layer;
- a nonmagnetic conductive layer interposed between said first and second ferromagnetic layers;
- and
- an antiferromagnetic layer coupled with one of said first and second ferromagnetic layers;
- wherein said antiferromagnetic layer comprises an antiferromagnetic antimony-base alloy.
A magnetoresistive film having a layered structure, said layered structure comprising:
- a first ferromagnetic layer;
- a second ferromagnetic layer;
- a nonmagnetic conductive layer interposed between said first and second ferromagnetic layers;
- and
- an antiferromagnetic layer coupled with one of said first and second ferromagnetic layers;
- wherein said antiferromagnetic layer comprises an antiferromagnetic fluoride.
A magnetoresistive film having a layered structure, said layered structure comprising:
- a first ferromagnetic layer;
- a second ferromagnetic layer;
- a nonmagnetic conductive layer interposed between said first and second ferromagnetic layers;
- and
- an antiferromagnetic layer coupled with one of said first and second ferromagnetic layers;
- wherein said antiferromagnetic layer comprises an FeRh-base alloy containing at least one metallic element selected from the group consisting of Pt, Ir, Pd, Zr, Nb, Hf, Ta, W, Re and Os.
The magnetoresistive film having a layered structure, said layered structure comprising:
- a first ferromagnetic layer;
- a second ferromagnetic layer;
- a nonmagnetic conductive layer interposed between said first and second ferromagnetic layers;
- and
- an antiferromagnetic layer coupled with one of said first and second ferromagnetic layers;
- wherein said antiferromagnetic layer comprises Fe.sub.50 Rh.sub.50-X Pd.sub.X (0<X.ltoreq.30).
A magnetoresistive film having a layered structure, said layered structure comprising:
- a first ferromagnetic layer;
- a second ferromagnetic layer;
- a nonmagnetic conductive layer interposed between said first and second ferromagnetic layers;
- an antiferromagnetic layer coupled with one of said first and second ferromagnetic layers;
- and
- an underlayer arranged beneath said antiferromagnetic layer;
- wherein said antiferromagnetic layer comprises FeS;
- and
- wherein said underlayer comprises at least one metallic material in the Group IVa, Group Va or Group VIa of the periodic table, or a metallic material having a bcc crystal structure.
A magnetoresistive film having a layered structure, said layered structure comprising:
- a first ferromagnetic layer;
- a second ferromagnetic layer;
- a nonmagnetic conductive layer interposed between said first and second ferromagnetic layers;
- and
- an antiferromagnetic layer coupled with one of said first and second ferromagnetic layers;
- wherein said antiferromagnetic layer comprises an IrMnCo-base alloy.
A magnetoresistive film having a layered structure, said layered structure comprising:
- a first ferromagnetic layer;
- a second ferromagnetic layer;
- a nonmagnetic conductive layer interposed between said first and second ferromagnetic layers;
- and
- an antiferromagnetic layer coupled with one of said first and second ferromagnetic layers;
- wherein said antiferromagnetic layer comprises a CrAl-base alloy.
A magnetoresistive film having a layered structure, said layered structure comprising:
- a first ferromagnetic layer;
- a second ferromagnetic layer;
- a nonmagnetic conductive layer interposed between said first and second ferromagnetic layers;
- an antiferromagnetic layer coupled with one of said first and second ferromagnetic layers;
- and
- an underlayer provided beneath said antiferromagnetic layer;
- wherein said antiferromagnetic layer comprises a material having a body-centered cubic or tetragonal structure, and wherein said underlayer comprises a material having a body-centered cubic structure.
A magnetoresistive element comprising:
- a magnetoresistive film;
- and
- a domain control film having a layered structure for controlling a magnetic domain of said magnetoresistive film,
- said layered structure including:
- an antiferromagnetic layer comprising a material having a body-centered cubic or tetragonal structure,
- a ferromagnetic layer provided on said antiferromagnetic layer, and
- an underlayer provided beneath said antiferromagnetic layer and comprising a material having a body-centered cubic structure.
Dependencies are inferred from the claim text.