Patent ID: 7144642

Claim:
An oxide magnetic material including a ferrite having a hexagonal M-type magnetoplumbite structure as a main phase, the material comprising: A, which is at least one element selected from the group consisting of Sr, Ba, Pb and Ca; R, which is at least one element selected from the group consisting of the rare-earth elements (including Y) and Bi and which always includes La; and Fe, wherein the ratio of the constituents A, R and Fe of the oxide magnetic material is represented by (1−x)AO.(x/2)R 2 O 3 .nFe 2 O 3 , Formula 1: where 0.05≦x≦0.3, and 5.0≦n≦6.5, and wherein another oxide magnetic material, including a ferrite having a hexagonal W-type magnetoplumbite structure as a main phase, is added at 0.6 wt % to 20.8 wt % to the oxide magnet material including the ferrite having the hexagonal M-type magnetoplumbite structure as its main phase, the oxide magnetic material to be added being represented by: AO.2MO.8Fe 2 O 3 (AM 2 Fe 16 O 27 ) Formula 2: where M is at least one element selected from the group consisting of Co, Ni, Mn and Zn.