Patent ID: 8177922
Filing Date: 2012-05-15
Classification: B22F,C22C,H01F

Abstract:
1. An R—Fe—B based anisotropic sintered magnet (where R is at least one of the rare-earth elements that include Y) comprising, as a main phase, an R 2 Fe 14 B type compound that includes a light rare-earth element RL (which is at least one of Nd and Pr) as a major rare-earth element R, and also comprising a heavy rare-earth element RH (which is at least one element selected from the group consisting of Dy and Tb), wherein the magnet includes a portion in which at least two peaks of diffraction are observed within a 2θ range of 60.5 degrees to 61.5 degrees when an X-ray diffraction measurement is carried out using a CuKα ray on a plane that is located at a depth of 500 μm or less under a pole face of the magnet and that is parallel to the pole face.