| abstract |
The present invention provides a composite magnetic material having excellent coercive force by containing ε-Fe 2 O 3 and also having a large residual magnetization. A composite magnetic material 3 of the present invention has a matrix 2 formed of SiO 2 and magnetic particles 1 dispersed in the matrix 2, and the magnetic particles 1 have a core portion containing Fe. comprising the 1a, a coating layer 1b covering the surface of the core portion 1a, and the coating layer 1b, as well as including the ε-Fe 2 O 3, the concentration of the ε-Fe 2 O 3, the core portion It is characterized by being included so as to gradually decrease as the distance from 1a increases. [Selection] Figure 1 |