| abstract |
It is an object of the present invention to provide a ferrite magnetic material that can maintain a high Br and HcJ and obtain a permanent magnet having a high Hk / HcJ. The ferrite magnetic material according to a preferred embodiment has a ferrite phase having a hexagonal structure, Ca 1-w-x- y R w Sr x Ba y Fe z M m O 19 (R is as essential La A rare earth element (including Y) and at least one element of Bi, and M is represented by at least one element of Co, Mn, Mg, Ni, Cu, and Zn, which requires Co 0.25 <w <0.65, 0.01 <x <0.45, 0.0002 <y <0.011, y <x, 8 <z <11, 1 0.0 <w / m <2.5, 0.017 <m / z <0.065 is satisfied, the total amount of Si components is 0.1 to 3% by mass with respect to the main composition, and each The element satisfies the relationship of 1.5 ≦ [(Ca + R + Sr + Ba) − (Fe + M) / 12] /Si≦3.5. |