| 摘要 |
PROBLEM TO BE SOLVED: To provide a rare-earth magnet excellent in high temperature coercive force, while reducing the amount of Nd.SOLUTION: A crystal grain 10 having a whole composition of (CeNd)FeCoBM(in the formula, M is at least one kind of Ga, Al, Cu, Au, Ag, Zn, In, Mn, 0≤x≤0.75, 5≤y≤20, 4≤z≤6.5, 0≤w≤8, 0≤v≤2) is constituted of a core 1 and a shell 2 therearound, The Nd concentration is higher in the shell 2 than in the core 1.SELECTED DRAWING: Figure 1 |
