Perpendicular magnetic recording medium with grain isolation magnetic anistropy layer
US8488276B1 · kind B1 · utility
74Cited by
23References
28Claims
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Key dates
| Filing date | Sep 30, 2008 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Apr 18, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49044
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A perpendicular magnetic recording (PMR) media including a non-magnetic or superparamagnetic grain isolation magnetic anisotropy layer (GIMAL) to provide a template for initially well-isolated small grain microstructure as well as improvement of Ku in core grains of a magnetic recording layer. The GIMAL composition may be adjusted to have lattice parameters similar to a bottom magnetic recording layer and to provide a buffer for reducing interface strains caused by lattice mismatch between the bottom magnetic recording layer and an underlying layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.