Single layer small grain size FePT:C film for heat assisted magnetic recording media
US9542968B1 · kind B1 · utility
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11Claims
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Key dates
| Filing date | Oct 31, 2013 |
| Grant date | Jan 10, 2017 |
| Priority date | — |
| Expiry date | Jun 17, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/84
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
FePt-based heat assisted magnetic recording (HAMR) media comprising a thick granular FePt:C magnetic recording layer capable of maintaining a single layer film having desirable magnetic properties. According to one embodiment, the thick granular FePt:C magnetic recording layer comprises a plurality of carbon doped FePt alloy columnar grains, where the plurality of carbon doped FePt alloy columnar grains comprise a carbon gradient along the thickness of the hard magnetic recording layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.