Magnetic recording media having enhanced coupling between magnetic layers
US6645614B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2001 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Jul 11, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A high areal recording density magnetic recording medium having improved thermal stability comprises:a non-magnetic substrate having at least one surface; anda layer stack overlying the at least one surface, comprised of at least one layer pair composed of first and second superposed ferromagnetic layers spaced-apart by a magnetic coupling structure comprising a thin non-magnetic spacer layer and at least one thin ferromagnetic interface layer at at least one interface between the non-magnetic spacer layer and the superposed ferromagnetic layers;wherein the thickness of the ferromagnetic interface layer is selected to provide enhancement of the magnetic coupling between the pair of ferromagnetic layers, thereby increasing the thermal stability of the magnetic recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.