Claims
- 1. A method for producing a magnetic bias field in a magnetic bubble domain memory device, said method comprising coupling a magnetic bubble domain element with a permanent magnet, said permanent magnet being formed of a rare earth metal-containing alloy having the general formula
- R(Co.sub.1-x-y Cu.sub.x Ni.sub.y).sub.z,
- in which R is a rare earth element and x, y and z are each positive numbers, x ranges from 0.001 to 0.4, y ranges from 0.001 to 0.6, and z ranges from 4.0 to 9.0, with the proviso that x+y is less than 1.
- 2. The method of claim 1, wherein said rare earth metal containing alloy further contains an auxiliary adjuvant element denoted by M so that said alloy has the general formula
- R(Co.sub.1-x-y-u Cu.sub.x Ni.sub.y M.sub.u).sub.z,
- wherein M is at least one member selected from the group consisting of calcium, silicon and at least one transition metal other than nickel and cobalt, and u is a positive number not exceeding 0.6, with the proviso that x+y+u is less than 1.
- 3. The method of claims 1 or 2, wherein said rare earth element denoted by R is at least one member selected from the group consisting of samarium and cerium.
- 4. The method of claim 2, wherein said transition metal other than nickel and cobalt is a metal selected from the group consisting of zirconium, titanium, hafnium, manganese, tantalum, niobium and chromium.
Priority Claims (1)
Number |
Date |
Country |
Kind |
56-156988 |
Oct 1981 |
JPX |
|
CROSS REFERENCE TO RELATED APPLICATION
This application is a division of our application Ser. No. 425,956 filed Sept. 28, 1982 and entitled "Rare Earth Metal-Containing Permanent Magnet Alloys", now abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (2)
Number |
Date |
Country |
55-27612 |
Jul 1980 |
JPX |
2071146 |
Sep 1981 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
425956 |
Sep 1982 |
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