A magnetic material core-shell type, device, and antenna system.

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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. ŽSOLUTION : The core shell type magnetic material includes amorphous magnetic metal particles containing at least one magnetic metal selected from a group of Fe, Co and Ni, and at least one nonmagnetic metal selected from a group of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, a rare earth element, Ba, and Sr, and core shell type magnetic particles including an oxide coating layer made to cover surfaces of at least some of the magnetic metal particles and made of oxide containing at least the one nonmagnetic metal as one of constituents of the magnetic metal particles. ŽCOPYRIGHT : (C)2010, JPO&INPIT Ž