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.
Claims20
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.
A method of manufacturing at least a portion of a magnetic recording layer of a magnetic stack, wherein the method comprises:
- forming a layer on a first major surface of a substrate, wherein the layer comprises at least one magnetic composition, wherein the at least one magnetic composition is antiferromagnetic;
- and
- converting a plurality of discrete regions in the layer into ferromagnetic, discrete regions within a matrix of the at least one magnetic composition that is antiferromagnetic to form at least a portion of the magnetic recording layer of the magnetic stack, wherein each ferromagnetic, discrete region corresponds to a magnetic domain configured to store a bit of data, 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.
Dependencies are inferred from the claim text.