Patent ID: 8305281

Claim:
A core-shell magnetic material comprising a plurality of core-shell magnetic particles, the core-shell magnetic particles comprising: magnetic metal particles containing: at least one magnetic metal selected from the group of Fe, Co, and Ni, at least one nonmagnetic metal selected from the group of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, a rare-earth element, Ba, and Sr, and at least one element selected from carbon and nitrogen; oxide coating layers coating surfaces of at least a portion of the magnetic metal particles, the oxide coating layers being made of an oxide containing at least one nonmagnetic metal contained in the magnetic metal particles; and oxide particles existing in at least a part of space between the magnetic metal particles, the oxide particles containing at least one nonmagnetic metal selected from the group of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, a rare-earth element, Ba, and Sr, wherein a nonmagnetic metal/magnetic metal ratio in the oxide particles is higher than that in the oxide coating layer, the nonmagnetic metal/magnetic metal ratio being an atomic ratio.