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US 6,791,807 B1Granted
Spin-valve magnetic transducing element and magnetic head having free layer with negative magnetostriction
AssigneeRead-Rite SMI Corporation
InventorsFuminori Hikami, Hideyasu Nagai, Masaki Ueno, Marcos M. Lederman, Hirohiko Kamimura, Masahiko Ando, Kenji Komaki
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Abstract
A spin-valve magnetic transducing element. In one embodiment, a spin-valve magnetic transducing element is disclosed in which a ferromagnetic tunneling junction film, including first and second ferromagnetic layers and an insulating layer is enclosed between the ferromagnetic layers. A nonmagnetic metal thin film is inserted between the second ferromagnetic layer and the insulating layer, all of which are formed on a substrate.
Claims1
A spin-valve magnetic transducing element comprising:
- a free magnetic layer of a material that includes Co, the free magnetic layer having a negative magnetostriction constant λ within the range 0>λ>−1×10−6;
- a fixed magnetic layer;
- a nonmagnetic layer enclosed between the free and fixed magnetic layers;
- and
- an antiferromagnetic layer adjacent to the fixed magnetic layer.
2 more elements
Dependencies are inferred from the claim text.