| 简介 |
[Problem] To provide a permanent magnet possessing a high coercivity and a high residual magnetic flux density. [Solution] Provided is a permanent magnet containing R and T. R is a rare-earth element. Sm is required. One or more types of element selected from Y and Gd are required. T is Fe alone or Fe and Co. Some of T may be replaced with M, and M is one or more types of elements selected from Ti, V, Cr, Mo, W, Zr, Hf, Nb, Ta, Al, Si, Cu, Zn, Ga, and Ge. The Sm content with respect to the entire R is 60-95 at%. The total content of Y and Gd is 5-35 at%. The permanent magnet contains main-phase crystal grains having a ThMn12-type crystal structure. |
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