Sintered R-T-B based magnet

A sintered R-T-B based magnet comprising:

• a main phase which includes R2T14B compound particles;
• a grain boundary phase which is at grain boundaries of the main phase;
• a portion in which a concentration of Tb gradually decreases from a surface toward an interior of the magnet;
• a portion in which a concentration of Pr gradually decreases from the surface toward the interior of the magnet;
• a portion in which a concentration of Ga gradually decreases from the surface toward the interior of the magnet;
• Tb at a content of 0.30 mass % or lower, wherein
• the sintered R-T-B magnet:
• has a remanence (Br) of 1.47 T or greater and coercivity (HcJ) of 1900 kA/m or greater,
• includes RL (RL is at least one type of light rare-earth element and includes Nd and Pr), and satisfies 26.5 mass %≤[RL]−6[oxygen]≤28.8 mass %, where [RL] is the content (mass %) of RL and [oxygen] is the content (mass %) of oxygen, and
• satisfies 0.07 mass %≤[oxygen]≤0.15 mass %.