| abstract |
(57) [Summary]nPROBLEM TO BE SOLVED: To make La and / or Co non-uniform as compared with the prior art. Distributed, with higher Br and higher Hk / iHc than before Segment ferrite magnet or ring ferrite magnet A high-performance rotating machine provided with improved efficiency.nA circuit provided with a segment ferrite magnet A turning point, wherein the segment ferrite magnet comprises (A 1-x R x ) On [(Fe 1-y Co y ) 2 O 3 ](original (A is Sr and / or Ba, and R Is at least one of the rare earth elements including Y and La is required. X, y and n are the following conditions: 5.0 ≦ n Satisfies ≤6.4, 0.01≤x≤0.4, and 0.005≤y≤0.04 It is a number. ) And essentially Has a magnetoplumbite crystal structure, and La or Indicates a circle with a diameter of at least 0.2 μm in the low concentration region of Co. A rotating machine characterized by being present within a range. |