Rare earth magnet, method for manufacturing the same, and motor using rare earth magnet

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A rare earth magnet has a sintered body including : rare earth magnet particles; and a rare earth oxide being present between the rare earth magnet particles, the rare earth oxide being represented by a following general formula (I) : [in-line-formulae]R2O3   (I) [/in-line-formulae]where R is any one of terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium. The rare earth magnet particle is constituted by a cluster of numerous crystal grains, and an electric resistivity of the rare earth magnet is within a range from 26.0 to 75.0 μΩm.