| 摘要 |
<p>An object of the present invention is to provide a ferrite magnetic material capable of providing a permanent magnet in which high Br and HcJ are kept, and which has a high Hk/HcJ. A ferrite magnetic material in accordance with a preferred embodiment has a ferrite phase having a hexagonal structure and has a main composition represented by Ca 1-w-x-y R w Sr x Ba y Fe z M m O 19 (R is at least one element of rare earth elements (including Y) essentially including La, and Bi, and M is at least one element of Co, Mn, Mg, Ni, Cu, and Zn essentially including Co), where 0.25<w<0.65, 0.01<x<0.45, 0.0002<y<0.011, y<x, 8<z<11, 1.0<w/m<2.5, and 0.017<mlz<0.065 are satisfied. The total amount of a Si component is 0.1 to 3 mass% based on the amount of the main composition, and respective elements satisfy the relationship of 1.5‰¤[(Ca+R+Sr+Ba)-(Fe+M)/12]/Si‰¤3.5.</p> |
