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PROBLEM TO BE SOLVED : To provide a corrosion resistant magnet capable of preventing corrosion while repairing a magnet surface after machine working, and to provide a method of manufacturing the same in a sintered rare earth magnet. SOLUTION : An iron bulk phase is provided on the surface of a sintered rare earth magnet, and a magnetite phase is formed on the surface layer of the iron bulk phase. COPYRIGHT : (C)2007, JPO&INPIT