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US 2026/0080897 A1Published application
Magnetic stack, and related data storage devices, systems, and methods
AssigneeSeagate Technology LLC
InventorsAlexey Dobrynin, Kevin Anthony McNeill, Mark Anthony Gubbins
Life of this patent
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Abstract
A magnetic stack having a magnetic recording layer. The magnetic recording layer includes a plurality of ferromagnetic, discrete regions located within a matrix of at least one magnetic composition that is antiferromagnetic. Each ferromagnetic, discrete region corresponds to a magnetic domain for storing a bit of data. Related data storage devices, systems, and methods.
Claims21
1-20. (canceled)
A data storage device, comprising:
- a housing;
- a light source;
- a magnetic recording head comprising:
- a near-field transducer, and
- a waveguide;
- and
- at least one magnetic recording disk comprising:
- a magnetic stack comprising a magnetic recording layer, wherein the magnetic recording layer comprises:
- a plurality of ferromagnetic, discrete regions located within an antiferromagnetic matrix,
- wherein the plurality of ferromagnetic, discrete regions are formed from corresponding discrete regions within the antiferromagnetic matrix by converting the antiferromagnetic discrete regions of the antiferromagnetic matrix into the plurality of ferromagnetic, discrete regions on disk, and
- wherein the converting comprises:
- i) heating each of the plurality of discrete regions within the antiferromagnetic matrix to at least a temperature that causes each of the plurality of discrete regions to convert into the ferromagnetic, discrete regions, and/or
- ii) applying an external electric field to each of the plurality of discrete regions within the antiferromagnetic matrix for a time period to convert each of the plurality of discrete regions into the ferromagnetic, discrete regions.
10 more elements
A method of writing data to a media, comprising:
- directing laser energy toward a major surface of the media to convert a plurality of discrete regions within an antiferromagnetic matrix of a magnetic recording layer into ferromagnetic, discrete regions,
- wherein each of the plurality of discrete regions within the antiferromagnetic matrix are heated by the laser energy to at least a temperature that causes each of the plurality of discrete regions to convert into the ferromagnetic, discrete regions.
A method of writing data to a media, comprising:
- applying an external electric field to each of a plurality of discrete regions within a magnetic recording layer comprising an antiferromagnetic matrix for a time period to convert each of the plurality of discrete regions into ferromagnetic, discrete regions.
Dependencies are inferred from the claim text.