Electromagnetic data storage devices
AssigneePeacekeeper (International) Ltd.
InventorsChristopher Binns, David Binns, John Kinmont
Life of this patent
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Abstract
The present invention relates to an electromagnetic data storage device comprising a data storage medium including a magnetic material, and a write head including an electromagnetic element operable to generate a magnetic field that impinges on a selected portion of the magnetic material of the data storage medium adjacent the write head, so as to affect the magnetisation direction of the selected portion of magnetic material. The electromagnetic element includes a magnetic structure including a matrix material, and a plurality of magnetic nanoparticles held in the matrix material.
Claims20
A write head device for an electromagnetic data storage device which includes a data storage medium including a magnetic material, wherein the write head device comprises a write head operable to generate a magnetic field that impinges on a selected portion of the magnetic material of the data storage medium adjacent the write head, so as to affect the magnetiszation direction of the selected portion of the magnetic material, the write head comprising:
- a magnetic structure including a matrix material and a plurality of magnetic nanoparticles held in the matrix material;
- and
- an activation element operable to induce the magnetic field in the magnetic structure,
- wherein each of the plurality of magnetic nanoparticles comprises a core wholly or substantially covered with a shell layer separate from the matrix material,
- wherein at least one of the matrix material and the core is of ferromagnetic material,
- wherein the shell layer is of a different material than the core, and
- wherein the shell layers of the plurality of magnetic nanoparticles substantially prevent contact between the cores of adjacent nanoparticles.
An electromagnetic data storage device comprising:
- a data storage medium including a magnetic material;
- and
- a write head device having a write head operable to generate a magnetic field that impinges on a selected portion of the magnetic material of the data storage medium adjacent the write head, so as to affect the magnetization direction of the selected portion of the magnetic material, the write head comprising:
- a magnetic structure including a matrix material and a plurality of magnetic nanoparticles held in the matrix material;
- and
- an activation element operable to induce a magnetic field in the magnetic structure,
- wherein each of the plurality of magnetic nanoparticles comprises a core wholly or substantially covered with a shell layer separate from the matrix material to substantially prevent contact between the cores of adjacent nanoparticals,
- wherein at least one material of the matrix material or the core is of a ferromagnetic material, and
- wherein the shell layer is of a different material than the core.
A write head device for an electromagnetic data storage device which includes a data storage medium including a magnetic material, wherein the write head device comprises a write head operable to generate a magnetic field that impinges on a selected portion of the magnetic material of the data storage medium adjacent the write head, so as to affect the magnetization direction of the selected portion of the magnetic material, the write head comprising:
- a magnetic structure including a matrix material and a plurality of magnetic nanoparticles held in the matrix material;
- and
- an activation element operable to induce the magnetic field in the magnetic structure,
- wherein each of the plurality of magnetic nanoparticles comprises a core wholly or substantially covered with a shell layer separate from the matrix material, the shell being formed of a material that is different than the core and formed to substantially prevent contact between the cores of adjacent nanoparticles, the shell layer including a material selected from a nonmagnetic material, a transition metal, an alloy of a transition metal, a rare earth metal, an alloy of a rare earth metal, or a combination thereof;
- wherein the core of each of the plurality of nanoparticles is formed of a material selected from a ferromagnetic material, the ferromagnetic material including a ferromagnetic transition metal, an alloy of a ferromagnetic transition metal, or a combination thereof,
- wherein at least one material of the matrix material is of a ferromagnetic material, selected from a non-magnetic material, a transition metal, an alloy of a transition metal, a rare earth metal, an alloy of a rare earth metal, or a combination thereof, and
- wherein at least one material of the matrix material and each of the plurality of magnetic nanoparticles includes embedded gas molecules or atoms.
Dependencies are inferred from the claim text.