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|1. (WO2018101410) RARE EARTH PERMANENT MAGNET|
|Title:||RARE EARTH PERMANENT MAGNET|
[Problem] To provide a rare earth permanent magnet having as a main phase a compound with a Nd5Fe17 crystalline structure having strong coercive force. [Solution] A rare earth permanent magnet having as a main phase a compound with a Nd5Fe17 crystalline structure, wherein when the composition ratio of the rare earth permanent magnet is expressed as RaT(100-a-b)Cb, where R is one or more rare earth elements requiring Sm, and T is one or more transition metal elements requiring Fe or Fe and Co, a and b satisfy 18 < a < 40 and 0.5 ≤ b, and a phase where R and C are denser than the main phase is provided in the grain boundary phase of the rare earth permanent magnet.