| 摘要 |
Permanent-magnetic material containing cerium mischmetal, whose composition is based on rare earths and cobalt with an atomic ratio of rare earths to cobalt of approximately 1:5, and samarium, in which the proportion of the rare earths consists up to a half, based on the atomic ratio of the rare earths amongst themselves, of the natural alloy didymium which is produced in the metallurgical extraction of rare earths and contains approximately 75 atom% of neodymium, 22 atom% of praseodymium and up to 3 atom% of a mixture of cerium, lanthanum and samarium. |
