Metallic glass, magnetic recording medium using the same, and method of manufacturing the magnetic recording medium
US8377580B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2008 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Jun 10, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/068
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium 1 includes a substrate 11; and a metallic glassy layer 12 that is arranged on the substrate 11 and has a plurality of convex portions 12A and concave portions 12B. The metallic glassy layer 12 has a chemical composition represented by any one of the formulae (1) to (3): FemPtnSixByPz (wherein, 20<m≦60 at %, 20<n≦55 at %, 11≦x<19 at %, 0≦y<8 at %, and 0<z<8 at %) (1); Fe55Pt25(SixByPz)20 (wherein, 11≦x<19 at %, 0≦y<8 at %, and 0<z<8 at %) (2); and (Fe0.55Pt0.25Si0.16B0.02P0.02)100-xMx (wherein 0<X≦6 at %; and M represents an element or a combination of an two or more of the elements selected from Zr, Nb, Ta, Hf, Ti, Mo, W, V, Cr, Mn, Al, Y, Ag, and rare earth elements.) (3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.