Patent ID: 8591760

Claim:
A ferrite magnetic material, in which its main phase comprises: a ferrite phase having a hexagonal crystal structure, and metal element composition constituting the ferrite magnetic material is expressed by the following formula (1), Ca 1-w-x-y R w Sr x Ba y Fe z M m (1) wherein: R in formula (1) is at least one element selected from the group consisting of rare-earth element, including Y, and Bi, which at least includes La, M in formula (1) is at least one element selected from the group consisting of Co, Mn, Mg, Ni, Cu, and Zn, which at least includes Co, w, x, y, z, and m in formula (1) respectively satisfies the following formulas (2), (3), (4), (5), (6), (7) and (8) 25 ≦w≦ 0.5 (2) 0.01 ≦x≦ 0.35 (3) 0.0001≦ y≦ 0.013 (4) y<x (5) 8.7≦ z≦ 9.9 (6) 1.0< w/m< 2.1 (7) 0.017< m/z< 0.055 (8), and an Si component is at least included as a sub-component, and wherein; when content y1 mass % of the Si component in the ferrite magnetic material, with respect to SiO 2 , is shown on Y-axis and a total content x1 of z and m is shown on X-axis, a relation between x1 and y1 is within a range surrounded by 4 points a(8.9, 1.2), b(8.3, 0.95), c(10.0, 0.35) and d(10.6, 0.6), placed on X-Y coordinate having the X and Y axes, residual flux density Br is from 392.0 to 478.5 mT, coercive force HcJ is from 301.0 to 434.4 kA/m, and squareness ratio Hk/HcJ is from 78.5% to 95.1%.