Perpendicular recording media having an exchange-spring structure
US7989096B2 · kind B2 · utility
6Cited by
25References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2010 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Jan 21, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/672
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording medium providing improved writeability in perpendicular recording applications includes a magnetic recording layer having an axis of magnetic anisotropy substantially perpendicular to the surface thereof, an exchange-spring layer ferromagnetically exchange coupled to the magnetic recording layer and having a coercivity less than the magnetic recording layer coercivity, and a coupling layer between the magnetic recording layer and the exchange-spring layer. The coupling layer regulates the ferromagnetic exchange coupling between the magnetic recording layer and the exchange-spring layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.