Method for producing sintered ferrite magnet

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A method for producing a sintered ferrite magnet having an M-type ferrite structure, comprising Ca, an R element that is at least one of rare earth elements and indispensably includes La, Ba, Fe and Co as indispensable elements, and having a composition represented by the formula : Ca1-x-yRxBayFe2n-zCOz, wherein (1-x-y), x, y, z and n represent the contents of Ca, the R element, Ba and Co, and a molar ratio, meeting 0.3 ≤ 1-x-y ≤ 0.65, 0.2 ≤ x ≤ 0.65, 0.001 ≤ 0.2, 0.03 ≤ z ≤ 0.65, 4 ≤ n ≤ 7, and 1-x-y > y; a bonded magnet comprising ferrite powder having the above composition and a binder, and a magnet roll, at least one magnetic pole portion of which is made of the above bonded magnet.