Method of designing patterned magnetic recording medium and patterned magnetic recording medium
US7339764B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 22, 2007 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | Mar 22, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/855
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of designing a patterned magnetic recording medium including a magnetic film with perpendicular magnetic anisotropy which is patterned into dots form includes steps of setting values to dot pattern periods Px and Py, a thickness “t”, a thermal stability factor Kn, a minimum inter-dot spacing S0, and a maximum recording field Hm, setting an initial value of a saturation magnetization Ms, finding a nucleation field for magnetization reversal Hn and estimating a coercivity Hc and a saturation field Hs, and repeating the steps given above so as to make the saturation field Hs lower than the maximum recording field Hm, thereby determining the magnetic properties Ms, Hn and Hc satisfying a desired condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.