Patent ID: 7988797

Claim:
A nanocomposite magnet having a composition represented by the general formula: R x Q y M z (Fe 1-m T m ) bal , where R is at least one rare-earth element, Q is at least one element selected from the group consisting of B and C, M is at least one metal element that is selected from the group consisting of Al, Si, Ti, V, Cr, Mn, Cu, Zn, Ga, Zr, Nb, Mo, Ag, Hf, Ta, W, Pt, Au and Pb and that always includes Ti, T is at least one element selected from the group consisting of Co and Ni, and the mole fractions x, y, z and m satisfy the inequalities of 6 at %≦x<10 at %, 10 at %≦y≦17 at %, 0.5 at %≦z≦6 at % and 0≦m≦0.5, respectively, the nanocomposite magnet including a hard magnetic phase and a soft magnetic phase that are magnetically coupled together, wherein the hard magnetic phase is made of an R 2 Fe 14 B-type compound, and wherein the soft magnetic phase includes an α-Fe phase and an Fe 2 B phase as its main phases.