Rare earth sintered magnet

Abstract

The present invention provides a rare earth sintered magnet which contains R (R represents one or more rare earth elements essentially including Nd), T (T represents one or more iron group elements essentially including Fe), B, M(Mrepresents one or more elements selected from among Al, Si, Cr, Mn, Cu, Zn, Ga, Ge, Mo, Sn, W, Pb and Bi) and M(Mrepresents one or more elements selected from among Ti, V, Zr, Nb, Hf and Ta), while comprising an RTB phase as the main phase. This rare earth sintered magnet is characterized in that: the Mis in an amount of from 0.5% by atom to 2% by atom; if (R), (T), (M) and (B) are the respective atomic percentages of the above-described R, T, Mand B, the relational expression (1) ((T)/14)+(M)≤(B)≤((R)/2)+((M)/2) is satisfied; and from 0.1% by volume to 10% by volume of all grain boundary phases in the magnet is composed of an RTMphase. This rare earth sintered magnet is able to achieve excellent magnetic characteristics including a good balance between high Br and high H.