| abstract |
A granular substance ( 1 ) having soft magnetic properties is provided which contains a matrix ( 3 ) composed of a nonmagnetic insulating organic material and ferromagnetic metal particles ( 2 ) dispersed in the matrix ( 3 ) and having a mean particle size of 50 nm or less, wherein the volume ratio of the matrix ( 3 ) is in the range of 5 to 50%. When the granular substance ( 1 ) is in the form of a film, it has a complex permeability the real part (μ′) of which is 40 or more at 1 GHz, a quality factor Q (Q=μ′/μ″ where μ″ is the imaginary part of the complex permeability) of 1 or more, and a saturation magnetization of 5 kG or more. |