Perpendicular recording media having an exchange-spring structure
US7687157B2 · kind B2 · utility
10Cited by
15References
26Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 21, 2005 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Oct 22, 2027 |
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.