Magnetoresistive head
AssigneeAlps Electric Co., Ltd.
InventorMasamichi Saito
Life of this patent
Estimating the term…
Abstract
As an antiferromagnetic layer achieving exchange anisotropic coupling with a ferromagnetic layer, any Mn alloy of Ru-Mn, Rh-Mn, Ir-Mn, Pd-Mn, and Pt-Mn alloys is used. The content of each element is 10 to 45 atomic % for Ru, 10 to 40 atomic % for Rh, 10 to 40 atomic % for Ir, 10 to 25 atomic % for Pd, and 10 to 25 atomic % for Pt, respectively. Since the alloy exhibits excellent corrosion resistance and exchange anisotropic magnetic field in spite of its irregular crystal structure, no high temperature treatment is required in order to achieve a change in the crystal structure. The alloy is durable to high temperature due to a decreased change in the exchange anisotropic magnetic field.
Claims16
A magnetoresistive head comprising:
- a magnetoresistive sensor, and
- an antiferromagnetic layer formed on the magnetoresistive sensor;
- wherein said magnetoresistive sensor includes a ferromagnetic layer magnetized by exchange anisotropic coupling with said antiferromagnetic layer;
- and
- wherein said antiferromagnetic layer consists of an X-Mn (manganese) alloy having an irregular crystal structure, wherein X is at least one element selected from the group consisting of Ru (ruthenium), Ir (iridium) and Pt (platinum).
A magnetoresistive head comprising:
- a magnetoresistive sensor;
- and
- an antiferromagnetic layer formed on the magnetoresistive sensor;
- where said magnetoresistive sensor includes a ferromagnetic layer magnetized by exchange anisotropic coupling with said antiferromagnetic layer;
- and
- wherein said antiferromagnetic layer consists of an X-Mn (manganese) alloy having an irregular crystal structure, wherein X is at least one element selected from the group consisting of Ru (ruthenium), Ir (iridium) and Pt (platinum).
Dependencies are inferred from the claim text.