Heat assisted magnetic recording media with amorphous magnetic grain boundary material
US11735217B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2021 |
| Grant date | Aug 22, 2023 |
| Priority date | — |
| Expiry date | Jul 17, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Aspects of the present disclosure provide a heat assisted magnetic recording HAMR media structure and methods for reducing the Curie temperature distribution to improve the signal-to-noise characteristics of HAMR media. A magnetic recording medium includes a substrate, a heat sink layer on the substrate, and a magnetic recording layer on the heat sink layer. The magnetic recording layer includes a plurality of magnetic recording grains configured for recording and comprising a first magnetic alloy. The magnetic recording layer further includes a plurality of segregants disposed to isolate the plurality of magnetic recording grains and comprising a second magnetic alloy. A Curie temperature of the second magnetic alloy is higher than a Curie temperature of the first magnetic alloy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.