Patent ID: 6902685

Claim:
An oxide magnetic material including, as a main phase, a ferrite having a hexagonal M-type magnetoplumbite structure, the material comprising: A, which is at least one element that is selected from the group consisting of Sr, Ba, Pb and Ca; R, which is at least one element that is selected from the group consisting of Y (yttrium), the rare earth elements and Bi; Fe; and B (boron), wherein the constituents A, R, Fe and B of the oxide magnetic material satisfy the inequalities of: 7.04 at %≦A≦8.68 at %; 0.07 at %≦R≦0.44 at %; 90.4 at %≦Fe≦92.5 at %; and 0.015 at %≦B≦0.87 at % with respect to the sum of the elements A, R, Fe and B; and wherein the material is represented by the general formula: (1−x)AO.(x/2)R 2 O 3 .n(Fe 2 O 3 ).y(B 2 O 3 ) where 0.01≦x≦0.05, 0.001≦y≦0.05, and 5.2≦n≦6.2.