Patent ID: 7390576
Filing Date: 2008-06-24
Classification: B22F,B82Y,C22C,H01F,Y10T

Abstract:
1. A magnetic metal particle aggregate whose main components and the contents thereof are represented by the following general formula (1): where T is one or both of Fe and Co, M is one or both of Pt and Pd, Z is at least one member selected from the group composed of Ag, Cu, Bi, Sb, Pb and Sn, X represents 0.3˜0.7, and Y represents 0.7˜1.0, the balance being impurities unavoidably incorporated during production, wherein the proportion of face-centered tetragonal structure is in the range of 10˜100%, the particles have an average diameter of 30 nm or less, and wherein the particles are in a dispersed state spaced apart from one another, the magnetic metal particle aggregate has overall fluidity, and the particle surfaces are coated with a surface-active agent.