A magnetic Fe-rare earth-Al/Si alloy

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A magnetic alloy has the composition Fe100-a-b-cREaAbCoc, where RE is a rare-earth element always including La, A is either Si or Al, 6 at% & a & 11 at%, 8 at% & b & 18 at%, and 0 at% & c & 9 at%, and has either a two phase structure consisting of an a -Fe phase and an (RE, Fe, A) phase including 30 at% to 90 at% of RE or a three phase structure consisting of the a -Fe phase, the (RE, Fe, A) phase including 30 at% to 90 at% of RE and an RE(Fe, A)13 compound phase with an NaZn13-type crystal structure. The respective phases have an average minor-axis size of 40 nm to 2 žm. The alloy is made by quenching at an average rate of 2 x 10 - 2 x 10 {C/S from 1500 - 160{C.