Abstract: An anisotropic rare earth sintered magnet represented by the formula (R1-aZra)x(Fe1-bCOb)100-x-y(M11-cM2c)y. R is Sm and at least one element selected from rare earth elements, M1 is at least one element selected from the group consisting of V, Cr, Mn, Ni, Cu, Zn, Ga, Al, and Si, M2 is at least one element selected from the group consisting of Ti, Nb, Mo, Hf, Ta, and W, and x, y, a, b, and c each satisfy 7?x?15 at %, 4?y?20 at %, 0?a?0.2, 0?b?0.5, and 0?c?0.9. The magnet includes 80% by volume or more of a main phase composed of a compound of a ThMn12 type crystal, the main phase having an average crystal grain size of 1 ?m or more, and an intergranular grain boundary phase being formed between adjacent main phase grains.

Abstract: An anisotropic rare earth sintered magnet represented by the formula (R1-aZra)x(Fe1-b COb)100-x-y(M11-cM2c)y where R is at least one element selected from rare earth elements and Sm is essential; M1 is at least one of V, Cr, Mn, Ni, Cu, Zn, Ga, Al, and Si; M2 is at least one of Ti, Nb, Mo, Hf, Ta, and W; and x, y, a, b, and c each satisfy certain conditions. The anisotropic rare earth sintered magnet includes 80% by volume or more of a main phase composed of a compound of a ThMn12 type crystal, the main phase having an average crystal grain size of 1 ?m or more, and containing an R-rich phase and an R(Fe,Co)2 phase in a grain boundary portion. A method for producing the anisotropic rare earth sintered magnet is also described.

Abstract: Provided are an anisotropic rare earth sintered magnet having a ThMn12-type crystal compound as a main phase and exhibits good magnetic characteristics, and a method for producing it. The anisotropic rare earth sintered magnet has a composition of a formula (R1-aZra)v(Fe1-bCob)100-v-w-x-y(M11-cM2c)wOxCy (where R is one or more kinds selected from rare earth elements and indispensably includes Sm, M1 is one or more kinds of elements selected from the group consisting of V, Cr, Mn, Ni, Cu, Zn, Ga, Al, and Si, M2 is one or more kinds of elements selected from the group consisting of Ti, Nb, Mo, Hf, Ta, and W, and v, w, x, y, a, b, and c each satisfy 7?v?15 at %, 4?w?20 at %, 0.2?x?4 at %, 0.2?y?2 at %, 0?a?0.2, 0?b?0.5, and 0?c?0.9), which contains a main phase of a ThMn12-type crystal compound in an amount of 80% by volume or more with the average crystal particle diameter of the main phase being 1 ?m or more, which contains an R oxycarbide in the grain boundary area, and which has a density of 7.