Abstract: Disclosed is a Co—Fe alloy for soft magnetic films used in perpendicular magnetic recording media, etc., which maintains high soft magnetic properties and has excellent weather resistance. Disclosed is a Co—Fe alloy for soft magnetic films, which is a Co—Fe alloy the composition formula of which is expressed at atomic ratio as ((Co100?X—FeX)100?Y—NiY)100?(a+b+c)-Mla-M2b-Tic, where 5?X?80, 0?Y?25, 2?a?6, 2?b?10, and 0.5?c?10, the remainder of which is composed of unavoidable impurities, and wherein the element M1 in the aforementioned composition formula is one or two or more elements selected from (Zr, Hf, Y), and the element M2 in the aforementioned composition formula is one or two or more elements selected from (Ta, Nb).

Abstract: A Co alloy target comprising 1 to 10 atomic % of Zr and 1 to 10 atomic % of Nb and/or Ta, the balance being unavoidable impurities and Co, is produced by rapidly solidifying a melt of the Co alloy to produce an alloy powder, classifying the alloy powder to maximum particle size of 500 ?m or less, and pressure-sintering the classified alloy powder.

Abstract: The present invention relates to a Co—Fe—Zr based alloy target material for forming a soft magnetic film of the Co—Fe—Zr based alloy used in a perpendicular magnetic recording medium, and provides a Co—Fe—Zr based alloy target material having a low magnetic permeability and good sputtering characteristics and a process for producing this target material. A Co—Fe—Zr based alloy sputtering target material represented by the compositional formula based on the atomic ratio: (Cox—Fe100-X)100-(Y+Z)—ZrY-MZ (20?X?70, 2?Y?15 and 2?Z?10) in which the element(s) M is one or more elements selected from the group consisting of Ti, V, Nb, Ta, Cr, Mo, W, Si, Al and Mg, wherein a phase composed of HCP-Co and an alloy phase composed mainly of Fe are finely dispersed in the microstructure of the target material.

Abstract: A Co alloy target comprising 1 to 10 atomic % of Zr and 1 to 10 atomic % of Nb and/or Ta, the balance being unavoidable impurities and Co, is produced by rapidly solidifying a melt of the Co alloy to produce an alloy powder, classifying the alloy powder to maximum particle size of 500 ?m or less, and pressure-sintering the classified alloy powder.