The present invention is characterized in that, in a powder magnetic core obtained
by compaction of an iron-based magnetic powder covered with an insulation film,
a saturation magnetization Ms is Ms1.9 T in a 1.6 MA/m magnetic field;
a specific resistance is 1.5 m; a magnetic
flux density B2k is B2k1.1 T in a 2 kA/m magnetic
field; and a magnetic flux density B10k is B10k1.6
T in a 10 kA/m magnetic field. In accordance with the present invention, it has
been possible to industrially carry out compacting iron-based magnetic powders
under remarkably high compacting pressures. As a result, high-performance powder
magnetic cores are obtained which have a high density, and which are good in terms
of the specific resistance and magnetic permeability.
