Patent ID: 6648990
Filing Date: 2003-11-18
Classification: C22C,H01F

Abstract:
A Co-base magnetic alloy having a chemical composition represented by the following general formula, by atomic %: (Co1-aFea)100-y-cMâ€²yXâ€²c, where Mâ€² is at least one element selected from the group consisting of V, Ti, Zr, Nb, Mo, Hf, Sc, Ta and W; Xâ€² is Si and B; and a, y and c satisfy the formulas of a<0.35, 1.5&lE;y&lE;15, and 4&lE;c&lE;30, respectively, wherein the amount of B is from 4 atomic % to 10 atomic %, and wherein:at least a part of the alloy structure of the Co-base magnetic alloy consists of crystal grains having an average grain size of not more than 50 nm, the Co-base magnetic alloy has a relative initial permeability of not more than 2000, and a quality factor Q at 1 MHz is not less than 4.