抄録
We have investigated the carbonyl iron powder (CIP) for development of the low-loss power inductor at about 1 MHz. Significant differences were observed for the coercivity between two kinds of CIP (Non-reduction CIP and Reduction CIP). In order to investigate the origin of significant differences for the coercivity, we have studied two kinds of CIP. As a result, it was shown that Non-reduction CIP with low-coercivity is Fe-based nanocrystalline soft magnetic material with high saturation magnetization. We could produce a low-loss dust core using low coercivity CIP at about 1 MHz.
