R-T-B BASED SINTERED MAGNET AND METHOD FOR PRODUCING SAME

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An R-T-B based sintered magnet has a composition represented by the following formula (1) which satisfies the following inequality expressions (2) to (9) : [in-line-formulae]uRwBxGazAlvCoqTigFejM  (1)[/in-line-formulae] (R is at least one of rare-earth elements and indispensably includes Nd, M is an element except for R, B, Ga, Al, Co, Ti, and Fe, and u, w, x, z, v, q, g, and j are expressed in terms of % by mass). [in-line-formulae]29.0≦u≦32.0  (2)[/in-line-formulae] (heavy rare-earth elements RH account for 10% by mass or less of the R-T-B based sintered magnet) [in-line-formulae]0.93≦w≦1.00  (3)[/in-line-formulae] [in-line-formulae]0.3≦x≦0.8  (4)[/in-line-formulae] [in-line-formulae]0.05≦z≦0.5  (5)[/in-line-formulae] [in-line-formulae]0≦v≦3.0  (6)[/in-line-formulae] [in-line-formulae]0.15≦q≦0.28  (7)[/in-line-formulae] [in-line-formulae]60.42≦g≦69.57  (8)[/in-line-formulae] [in-line-formulae]0≦j≦2.0  (9)[/in-line-formulae] and satisfies other requirements.