| 简介 |
PROBLEM TO BE SOLVED : To provide a core shell type magnetic material which has superior characteristics in a high frequency band, especially, in a GHz band.
SOLUTION : The core shell type magnetic material includes : core shell type particles each including a magnetic metal particle and an oxide coating layer, the magnetic metal particle containing a magnetic metal selected from a group composed of Fe, Co and Ni, a nonmagnetic metal selected from Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, a rare earth element, Ba, and Sr, and an element selected between carbon and nitrogen, wherein the oxide coating layer is made of oxide containing at least the one nonmagnetic metal as one of constituents of the magnetic metal particles; and oxide particles partially present among the magnetic metal particles, and containing a nonmagnetic metal selected from Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, a rare earth element, Ba, and Sr, wherein the nonmagnetic metal/magnetic metal (atomic ratio) contains larger oxide particles than the nonmagnetic metal/magnetic metal (atomic ratio) in the oxide coating layer.
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