Patent ID: 8840800

Claim:
A magnetic material comprising magnetic particles which are particle aggregates containing metal nanoparticles and a first intermediate phase, the particle aggregates having a morphology with an average short dimension of from 10 nm to 2 μm and an average aspect ratio of 5 or greater, the metal nanoparticles have an average particle size of from 1 nm to 20 nm and contain at least one magnetic metal selected from a group consists of Fe, Co and Ni, the first intermediate phase is present between the metal nanoparticles and contain at least one non-magnetic particles selected from Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, Ba, Sr, Cr, Mo, Ag, Ga, Sc, V, Y, Nb, Pb, Cu, In, Sn, and rare earth elements, and the first intermediate phase contain any one of oxygen (O), nitrogen (N) and carbon (C), and the magnetic particles having a volume filling ratio of the metal nanoparticles of from 40 vol % to 80 vol % relative to the total volume of the particle aggregates.