Seltenerdbasierter gesinterter Magnet

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The present invention provides a rare earth based sintered magnet. The magnet is a rare earth based permanent magnet with a R-T-B (R represents one or more elements selected from Y and rare earth elements, T represents one or more metal elements including Fe or the combination of Fe and Co, and B represents B or the combination of B and C) based composition. When a R-rich phase (R represents rare earth element(s)) with atomic ratio of (Fe+Co)/(LR+HR+Fe+Co)≰0.2 (LR represents Y and light rare earth element(s) selected from 57La to 63Eu, and HR represents heavy rare earth element(s) selected from 64Gd to 71Lu) is present in the grain boundary triple point, a region with HR/(LR+HR)≧0.01 (atomic ratio) is present in the R-rich phase, and the region with HR/(LR+HR)≧0.01 accounts for 10% to 90% of the area of the grain boundary triple point.