Magnetic devices using nanocomposite materials
AssigneeNVE Corporation
InventorsDexin Wang, Zhenghong Qian, James M. Daughton, Robert T. Fayfield
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Abstract
A ferromagnetic thin-film based magnetoresistive device with a first ferromagnetic material based film having electrically conductive, ferromagnetic material nanogranules embedded in an intergranular material of a smaller electrical conductivity first nonmagnetic. The device may have an intermediate layer adjacent the first ferromagnetic material based film and a second film is on the other side of the intermediate layer of a substantially ferromagnetic material. The first film is less than 1.0 μm thick.
Claims52
A ferromagnetic thin-film based magnetoresistive device, said device comprising:
- a nonmagnetic intermediate layer, said intermediate layer having two major surfaces on opposite sides thereof;
- a first ferromagnetic material based film on one of said intermediate layer major surfaces having electrically conductive, ferromagnetic material nanogranules embedded in an intergranular material of a smaller electrical conductivity;
- and
- a second film on that remaining one of said intermediate layer major surfaces of a substantially ferromagnetic material.
A ferromagnetic thin-film based magnetoresistive device, said device comprising:
- a nonmagnetic intermediate layer, said intermediate layer having two major surfaces on opposite sides thereof;
- a first ferromagnetic material based film supported on one of said intermediate layer major surfaces having electrically conductive, ferromagnetic material nanogranules embedded in an intergranular material of a smaller electrical conductivity and having a coercivity;
- and
- a second film on that remaining one of said intermediate layer surfaces of a substantially ferromagnetic material, said second film having a coercivity greater than that of said first ferromagnetic material based film.
A ferromagnetic thin-film based magnetoresistive device, said device comprising:
- a substrate having a major surface;
- and
- a first ferromagnetic material based film of a thickness less than 1.0 μm supported on said substrate major surface having electrically conductive, ferromagnetic material nanogranules embedded in an intergranular material of a smaller electrical conductivity so as to have a permeability greater than 35.
A ferromagnetic thin-film based magnetoresistive device, said device comprising:
- a substrate having a major surface;
- and
- a first ferromagnetic material based film of a thickness less than 1.0 μm supported on said substrate major surface having electrically conductive, ferromagnetic material nanogranules embedded in an intergranular material of a small electrical conductivity having a coercivity less than 300.
Dependencies are inferred from the claim text.