| 摘要 |
PROBLEM TO BE SOLVED: To provide a W-type ferrite magnet material having magnetic characteristics which is more superior than M-type ferrite. SOLUTION: A is bivalent alkaline earth metals ion, preferably one or two or more kinds of elements from among Ba, Sr, Ca and Pb. B is a bivalent metal ion, preferably one or two or more kinds of elements from among Fe, Co, Ii, Mn, Mg, Cr, Cu and Zn. In a ferrite magnet material shown by a composition formula AO.n(BO).mFe2O3, a coefficient n has a value of at least 1.1 and at most 2.5, and a coefficient m has a value of at least 7.2 and at most 8.8. |
