Magnetic recording medium, magnetic storage apparatus and recording method
US7435489B2 · kind B2 · utility
5Cited by
9References
21Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 11, 2004 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Aug 29, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium is provided with an exchange layer structure, and a magnetic layer provided on the exchange layer structure. The exchange layer structure includes a ferromagnetic layer and a nonmagnetic coupling layer provided on the ferromagnetic layer, where the ferromagnetic layer and the magnetic layer are exchange-coupled and having mutually antiparallel magnetizations. The ferromagnetic layer and the magnetic layer satisfy a relationship Hc1′≧Hc2′, where Hc1′ denotes a dynamic coercivity of the ferromagnetic layer and Hc2′ denotes a dynamic coercivity of the magnetic layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.