PERMANENT MAGNET AND MANUFACTURING METHOD THEREOF

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PROBLEM TO BE SOLVED : To obtain a permanent magnet in which heat resistance and a magnetic characteristic can be effectively improved without increasing cost. SOLUTION : An insulating film composed of at least one of fullerene or chemically modified fullerene is formed on a boundary surface of magnetic powder containing rare earth, molding or density growth is performed on the magnetic powder in a magnetic field to obtain a primary compact, sintering or plastic working is performed on the primary compact to obtain a secondary compact, and then heat treatment is performed on the secondary compact. COPYRIGHT : (C)2011, JPO&INPIT