R-T-B BASE ALLOY, PROCESS FOR PRODUCTION THEREOF, FINE POWDER FOR R-T-B BASE RARE EARTH PERMANENT

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An R-T-B base alloy useful as raw material for rare earth permanent magnet (wherein R is at least one member selected from among Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Ho, Er, Tm, Yb and Lu; T is a transition metal containing Fe in an amount of 80%% by mass or above; and B is a substance which contains B in an amount of 50%% by mass or above and at least one member selected from between C and N in an amount of 0%% by mass or above and below 50%% by mass), which alloy has an Mn concentration of 0.05wt%% or below.© KIPO & WIPO 2009