FERRITE MAGNETIC MATERIAL

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PROBLEM TO BE SOLVED : To provide a technology capable of suppressing reduction in the coercive force of M-type ferrite containing R-Co even if one part of Co is replaced with Zn or the like. SOLUTION : This ferrite magnetic material has a constituent expressed by A1-xRx(Fe12-y(Co1-mMem)y)zO19(wherein, A is at least one kind selected from Sr, Ba, Ca and Pb, R is at least one kind selected from rare-earth elements (including Y) and Bi, and always includes La. Me is one kind or two kinds or more of Zn, Ni, and Mg, and 0.04≤x≤0.9, 0.04≤y≤1.0, 0.05≤m≤0.9, 0.7≤z≤1.2) as a main ingredient, and wherein x/yz=1.1-1.8. COPYRIGHT : (C)2006, JPO&NCIPI