Rare earth-based alloy for permanent magnet.

摘要

Disclosed is a novel rare earth-iron-based magnetic alloy and a permanent magnet having a chemical composition represented by the general formula (R1-xMx)(Fe1-yCoy)z, in which R is a rare earth element, e.g., samarium, M is a non-magnetic additive element selected from the group consisting of zirconium, hafnium, bismuth, tin, indium and lead, the subscript x is a positive number in the range from 0.01 to 0.4, the subscript y is zero or a positive number not exceeding 0.5 and the subscript z is a positive number in the range from 10 to 13.