The permanent magnet and its manufacturing method

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PROBLEM TO BE SOLVED : To provide an R2 Fe14 B-based permanent magnet, that has very high coercive force and a sufficiently high remanent magnetic flux density, and that is superior in corrosion resistance. SOLUTION : This permanent magnet contains R (at least one kind of rare- earth element), T (Fe or Fe and Co), and B at the main components. In the magnet, adjacent main phases are substantially isolated from each other by surrounding each main phase, containing RH (at least one kind of heavy rare- earth element) and RL (at least one kind of light rear-earth element) and composed substantially of an RL2 T14 B intermetallic compound having isolated phase, composed substantially of an RH2 T14 B intermetallic compound. In addition, this permanent magnet contains a low-melting point element ML, which lowers the melting point of the RH2 T14 B.