Alloy target used for manufacturing magneto-optical recording medium
US4992095A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1989 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Oct 26, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10586
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An alloy target used for manufacturing a magneto-optical recording medium, wherein the component and composition comprises 10-50 atom % of at least one of rare earth elements selected from the group consisting of Nd, Sm, Gd, Tb, Dy, Ho, Er and Tm, from 0.1 to 10 atom % of at least one of additive elements selected from the group consisting of B, Al, Si, P, Ti, V, Cr, Mn, Zr, Nb, Mo, Hf, Ta, W, Pt, Pb and Bi and the balance substantially composed of at least one of transition metals selected from the group consisting of Co, Fe and Ni; and a structure comprises any one of mixed structure from a group consisting of (1) a mixed structure comprising a phase of intermetallic compound of rare earth element--additive element--transition metal, and a fine mixed phase of rare earth element and intermetallic compound of rare earth element--transition metal, (2) a mixed structure comprising a phase of intermetallic compound of rare earth element--transition metal and a fine mixed phase of rare earth element and intermetallic compound of rare earth element--transition metal (at least one of the rare earth element and the intermetallic compound in the fine mixed phase contains additive element);…
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